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1.
Bredikhin A. A. Pashagin A. V. Strunskaya E. I. Gubaydullin A. T. Litvinov I. A. Bredikhina Z. A. 《Russian Chemical Bulletin》1999,48(11):2086-2090
2,3-Epoxy alcohols (glycidols) react with carboxylic acid dichlorides to form cyclic esters of 3-chloro-1,2-diols. The reaction
proceeds with complete retention of the configuration of the C(2) atom of the initial glycidol and with predominant (but not
complete) inversion of the configuration of the C(3) atom in the final heterocycle.
Translated fromIzvestiya Akademii Nuak. Seriya Khimicheskaya, No. 11, pp. 2110–2114, November, 1999. 相似文献
2.
Rassukanaya Yu. V. Sizonenko Ya. A. Sinitsa A. A. Boiko V. I. Podoprigorina A. A. Onys'ko P. P. 《Russian Journal of General Chemistry》2002,72(11):1695-1698
N-(Trichloroacetyl)trichloroacetylimidoyl chloride reacts with trialkyl phosphites with substitution of the imidoyl chlorine atom and formation of C-phosphorylated heterodienes. The reaction with triphenyl phosphite or o-phenylene diethylphosphoroamidite proceeds as [4+1]-cycloaddition to give mono- or spirocyclic oxazaphospholines with the five-coordinate phosphorus atom. Dialkyl or diphenyl hydrogen phosphites add across the C = N bond of imidoyl chloride to give labile N-(-phosphorylated) trichloroacetamides. 相似文献
3.
Reactions ofN-(4-nitrophenylthio)morpholine,N,N′-thiobismorpholine, andN,N′-dithiobismorpholine with thionyl chloride or sulfuryl chloride at −40°C afford electrophilic chlorosulfenylating reagents,
which add to the C=C bond of norbornene in high yields. Semiempirical quantum-chemical calculations and comparison of the
relative reactivity of the sulfenylating complexes formed upon activation of arenesulfenamides by sulfur and phosphorus oxohalides
were performed. The mechanism of the reactions is discussed.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2516–2518, December, 1998. 相似文献
4.
Hee-Young Park Dong-Won Lee Hwa-Soo Lee Dong-Ok Lim Dae-Won Park 《Reaction Kinetics and Catalysis Letters》2003,79(2):245-255
Photopolymers with both pendant cyclic carbonate groups and cinnamic ester groups were synthesized by the addition reaction
of poly(glycidyl methacryalte-co-styrene)[poly(GMA-co-AN)] with carbon dioxide and then with cinnamoyl chloride. Soluble quaternary ammonium salt catalysts showed good yield of
cinnamoyl chloride addition to the glycidyl methacrylate groups. Quaternary salt catalysts of longer alkyl chain length and
of more nucleophilic anion offered higher yield of cinnamoyl chloride addition. Photochemical reaction test showed that poly(CNMA-co-DOMA-co-St) had a good photosensitivity.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
5.
Sharutin V. V. Sharutina O. K. Pakusina A. P. Platonova T. P. Zadachina O. P. Gerasimenko A. V. 《Russian Journal of Coordination Chemistry》2003,29(2):89-92
Tetraphenylantimony chloride and bromide were synthesized through the reaction of pentaphenylantimony with diphenylantimony trichloride or tribromide taken at a molar ratio of 2 : 1 in toluene. When the initial compounds were taken at a molar ratio of 1 : 1, triphenylantimony dichloride or dibromide was formed. The phenylation of triphenylantimony sulfate with pentaphenylantimony yielded tetraphenylantimony sulfate. According to the X-ray diffraction data, the antimony atom in the tetraphenylantimony chloride molecule has a distorted trigonal bipyramidal configuration with the chlorine atom in the axial position. The Sb–Cl distance is equal to 2.686(1) and Sb–C distances are equal to 2.113(4) and 2.165(4) Å (av. 2.130 Å). 相似文献
6.
The spin-spin coupling constants 3
J
C,H between the hydrogen atom of the aldonitrone group and the carbon atom bound to the nitrogen atom of the N-oxide fragment were determined for a wide range of cyclic and acyclic aldonitrones. Based on comparison of these constants (trans-3
J
C,H (E isomer) > cis-3
J
C,H (Z isomer)), the Z configuration was assigned to acyclic nitrones. Coordination of organolithium compounds to the oxygen atom of the NO group was revealed by 13C NMR spectroscopy. This coordination is the necessary condition for the metallation of aldonitrones. The configuration of the nitrone group is responsible for the ability of the E form of acyclic aldonitrones to undergo CD3ONa-catalyzed isotope exchange of the methine proton in CD3OD and metallation with BusLi. 相似文献
7.
Dehydrated ammonium carnallite was synthesized with bischofite from salt lake and ammonium chloride solution in a 1:1 molar
ratio of MgCl2:NH4Cl, dehydrated at 160°C for about 4 h. The yield was above 85%. The product was then mixed with solid-state ammonium chloride
with a 1:4 mass ratio for the further dehydration at 410°C. The decomposition of NH4Cl made a pressure of NH3 at 30.5 kPa to prevent the hydrolysis of ammonium carnallite. The anhydration of magnesium chloride was achieved at 700°C.
The results showed that anhydrous magnesium chloride contains magnesium oxide in an amount that was less than 0.1% by weight.
XRD pattern and SEM micrograph showed a good dispersion of ammonium carnallite and anhydrous magnesium chloride crystals with
well-distributed big grains, just enough to meet the need for the production of magnesium metal in the electrolysis process.
__________
Translated from Chinese Journal of Applied Chemistry, 2005, 22(8) (in Chinese) 相似文献
8.
Jean M. J. Tronchet Jean-Richard Neeser Luis Gonzalez Etienne J. Charollais 《Helvetica chimica acta》1979,62(6):2022-2024
Preparation of unsaturated sugars phosphonates using nucleophilic conjugate addition Different types of phosphorus nucleophiles underwent conjugate addition reaction with one of the branched-chain sugars 4, 5 or 11 the addition taking place either on the endo or the exo face of the furanose ring (or on both faces in the case of 11 ). The configuration at C(3) of these new phosphorus-bearing types of sugars as well as the configuration at the phosphorus atom of the cyclic phosphinates 9 and 10 was established by NMR. (3JP,H–C(2), 3JP,C(1)). Small amounts (7%) of the spiro enol phosphonate 16 were formed when 11 reacted with trimethyl phosphite. 相似文献
9.
A new monomer, N,N′‐bis(4‐phenoxybenzoyl)‐p‐phenylenediamine (BPBPPD), was prepared by the condensation of p‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N‐dimethylacetamide (DMAc). Novel aromatic poly(ether amide amide ether ketone ketone)s (PEAAEKKs) were synthesized by electrophilic Friedel–Crafts solution copolycondensation of BPBPPD with a mixture of terephthaloyl chloride (TPC) and isophthaloyl chloride (IPC), over a wide range of TPC/IPC molar ratios, in the presence of anhydrous aluminum chloride and N‐methylpyrrolidone (NMP) in 1,2‐dichloroethane (DCE). The influences of reaction conditions on the preparation of polymers were examined. The polymers obtained were characterized by different physico–chemical techniques such as FT‐IR, Differential scanning calorimetry (DSC), Thermogravimetric analysis (TGA), and wide angle X‐ray diffraction (WAXD). The polymers with 70–100 mol% IPC are semicrystalline and have remarkably increased Tgs over commercially available poly(ether ether ketone) (PEEK) and poly(ether ketone ketone) (PEKK) due to the incorporation of amide groups in the main chain. The polymers with 70–80 mol% IPC had not only high Tgs of 209–213°C, but also moderate Tms of 339–348°C, which are suitable for melt processing. The polymers with 70–80 mol% IPC had tensile strengths of 107.5–109.8 MPa, Young's moduli of 2.53–2.69 GPa, and elongations at break of 9–11% and exhibited high thermal stability and good resistance to organic solvents. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
10.
Hakima Chicha Latifa Bouissane Lahcen El Ammari Mohamed Saadi Michel Baltas 《合成通讯》2013,43(17):2005-2013
AbstractThe treatment of N-alkyl-5-nitroindazole with stannous chloride in ethanol, aftercoupling of the obtained amines with arylsulfonyl chloride in pyridine, gave the new 4-ethoxy- and 4-chloroindazoles bearing sulfonamide in moderate to good yields. Chlorination and ethoxylation of indazole were observed during the reduction of the nitro group with anhydrous SnCl2 in ethanol. The influence of the N-alkylation in N-1 and N-2 position of 5-nitroindazole on the reduction was investigated. The presence ofethoxy group and chlorine atom at position C-4 of indazole was confirmed by x-ray diffraction analysis of compounds 7a and 8a. 相似文献
11.
The sulfenylchlorination of a series of alkenes is investigated by using the combined reagent of dimethyl sulfoxide and oxalyl chloride. The corresponding β-chloro sulfides were obtained in mediate to good yields. Most of the terminal alkenes give the Markovnikov adducts mainly and the sulfenylchlorination of cyclic alkenes is stereospecific to produce the adducts with trans configuration. Methanesulfenyl chloride is supposed to be the real species for sulfenylchlorination. 相似文献
12.
A. A. Shubin R. S. Mitchenko T. V. Bezbozhnaya A. N. Vdovichenko 《Russian Chemical Bulletin》2005,54(10):2456-2459
A procedure was developed for the synthesis of previously unknown β-chlorovinyl derivatives of PtIV chloride complexes by chloroplatination of terminal alkynes catalyzed by PtII chloride complexes. The reaction is highly stereoselective and gives only the products of trans-anti-addition of platinum and chlorine atoms. The regioselectivity of the catalytic reaction formally corresponds to Markovnikov’s
rule, e.g., in alkynes containing electron-donating substituents, platinum attacks the terminal carbon atom. The σ-vinyl derivatives
of PtIV chloride complexes were characterized by IR spectroscopy and 1H and 13C NMR spectroscopy.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2380–2384, October, 2005. 相似文献
13.
V. V. Dunina E. B. Golovan N. S. Gulyukina Yu. K. Grishin I. P. Beletskaya 《Russian Chemical Bulletin》1997,46(7):1331-1334
The synthesis of a new optically active aminophosphine ligandi-Pramphos, containing a potentially stereogenic nitrogen atom, from (S)-N-isopropyl-N-methyl-α-methylbenzylamine is described; its complex with palladium(II) chloride was obtained. NMR spectroscopy revealed
that the coordination of the aminophosphine with the metal resulted in stereospecific locking of the donor nitrogen atom in
only one of two possible configurations.
The possibility of locking of the configuration of the asymmetric nitrogen atom during cyclopalladation was shown for the
first time in Ref. 19 for the prochiral ligand.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1385–1389, July, 1997. 相似文献
14.
Zahra Mardani Mohammad Hakimi Keyvan Moeini Fabian Mohr 《Acta Crystallographica. Section C, Structural Chemistry》2019,75(7):951-959
The reaction between 2‐[2‐(aminoethyl)amino]ethanol and pyridine‐2‐carbaldehyde in a 1:2 molar ratio affords a mixture containing 2‐({2‐[(pyridin‐2‐ylmethylidene)amino]ethyl}amino)ethanol (PMAE) and 2‐[2‐(pyridin‐2‐yl)oxazolidin‐3‐yl]‐N‐(pyridin‐2‐ylmethylidene)ethanamine (POPME). Treatment of this mixture with copper(II) chloride or cadmium(II) chloride gave trichlorido[(2‐hydroxyethyl)({2‐[(pyridin‐2‐ylmethylidene)amino]ethyl})azanium]copper(II) monohydrate, [Cu(C10H16N3O)Cl3]·H2O or [Cu(HPMAE)Cl3]·H2O, 1 , and dichlorido{2‐[2‐(pyridin‐2‐yl)oxazolidin‐3‐yl]‐N‐(pyridin‐2‐ylmethylidene)ethanamine}cadmium(II), [CdCl2(C16H18N4O)] or [CdCl2(POPME)], 2 , which were characterized by elemental analysis, FT–IR, Raman and 1H NMR spectroscopy and single‐crystal X‐ray diffraction. PMAE is potentially a tetradentate N3O‐donor ligand but coordinates to copper here as an N2 donor. In the structure of 1 , the geometry around the Cu atom is distorted square pyramidal. In 2 , the Cd atom has a distorted octahedral geometry. In addition to the hydrogen bonds, there are π–π stacking interactions between the pyridine rings in the crystal packing of 1 and 2 . The ability of PMAE, POPME and 1 to interact with ten selected biomolecules (BRAF kinase, CatB, DNA gyrase, HDAC7, rHA, RNR, TrxR, TS, Top II and B‐DNA) was investigated by docking studies and compared with doxorubicin. 相似文献
15.
V. V. Sharutin O. K. Sharutina A. P. Pakusina T. P. Platonova V. K. Bel'skii 《Russian Journal of General Chemistry》2002,72(3):392-393
Tri(p-tolyl)antimony dichloride was prepared by oxidation of tri(p-tolyl)stibine with chlorine or copper(II) chloride. As found by X-ray diffraction analysis, the antimony atom in tri(p-tolyl)antimony dichloride has the configuration of trigonal bipyramid with axially located chlorine atoms. The Sb-Cl and Sb-C distances are 2.476(2) and 2.104(7) Å, and the CSbC and ClSbCl angles are 120 and 180°, respectively. 相似文献
16.
By alternating‐current electrochemical technique crystals of copper(I) π‐complex with 1‐allylpyridinium chloride of [C5H5N(C3H5)][Cu2Cl3] ( 1 ) composition have been obtained and structurally investigated. Compound 1 crystallizes in monoclinic system, space group C2/c a = 24.035(1) Å, b = 11.4870(9) Å, c = 7.8170(5) Å, β = 95.010(5)°, V = 2150.0(2) Å3 (at 100 K), Z = 8, R = 0.028, for 4836 independent reflections. In the structure 1 trigonal‐pyramidal environment of π‐coordinated copper(I) atom is formed by a lengthened to 1.376(2) Å C=C bond of allyl group and by three chlorine atoms. Other two copper atoms are tetrahedrally surrounded by chlorine atoms only. The coordination polyhedra are combined into an original infinite (Cu4Cl62—)n fragment. Structural comparison of 1 and the recently studied copper(I) chloride π‐complexes with 3‐amino‐, 2‐amino‐, 4‐amino‐1‐allylpyridinium chlorides of respective [LCu2Cl3] ( 2 ), [L2Cu2Cl4] ( 3 ), and [LCuCl2] ( 4 ) compositions allowed us to reveal the trend of the inorganic fragment complication which depends on pKa (base) value of the corresponding initial heterocycle. 相似文献
17.
Der‐Jang Liaw Jun‐Jang Hsu Been‐Yang Liaw 《Journal of polymer science. Part A, Polymer chemistry》2001,39(17):2951-2956
A new cardo diacid chloride, 1,1‐bis‐[4‐(4‐chlorocarboxyphenoxy)phenyl]‐4‐tert‐butylcyclohexane ( 4 ), was synthesized from 1,1‐bis‐[4‐(4‐carboxyphenoxy)phenyl]‐4‐tert‐butylcyclohexane in refluxing thionyl chloride. Subsequently, various new polyesters were prepared from 4 with various bisphenols by solution polycondensation in nitrobenzene using pyridine as a hydrogen chloride quencher at 150 °C. These polyesters were produced with inherent viscosities of 0.32–0.50 dL · g?1. Most of these polyesters exhibited excellent solubility in a variety of solvents such as N,N‐dimethylformamide, tetrahydrofuran, tetrachloroethane, dimethyl sulfoxide, N,N‐dimethylacetamide, N‐methyl‐2‐pyrrolidinone, m‐cresol, o‐chlorophenol, and chloroform. These polymers showed glass‐transition temperatures (Tg's) between 144 and 197 °C. The polymer containing the adamantane group exhibited the highest Tg value. The 10% weight loss temperatures of the polyesters, measured by thermogravimetric analysis, were found to be in the range of 426–451 °C in nitrogen. These cardo polyesters exhibited higher Tg's and better solubility than bisphenol A‐based polyesters. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 2951–2956, 2001 相似文献
18.
Ab initio calculations of chloride complexes of Au, Hg, Tl, Pb, and Bi in anomalous oxidation states (2S1/2 electron state) were carried out by the Becke-Lee-Yang-Parr density functional method using the Dunning-Hay LanL2DZ basis
set. Optimum geometric parameters and electronic characteristics of MCl
n
(H2O)
m
n
(n=1–4 andm=0,4,5) complexes were determined. In each of the considered series the spin, population on the central metal atom decreases
as its atomic number increases. The energy of transition of the unpaired electron to the lowest unoccupied MO decreases in
the same order. The unpaired electron occupies an orbital that is mostly a linear combination of the s-orbital of the metal
atom and the p-orbital of the Cl atom (the antibonding σ-orbital of the M−Cl bond). Distinctions in the changes in spectral
properties of aquacomplexes and chloride complexes in isoelectronic series, observed as the degree of oxidation of the metal
atom increases, were explained. The results of calculations are in agreement with the experimental data obtained by ESR and
optical spectroscopy.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1049–1055, June, 1999. 相似文献
19.
Bismuth(III) chloride–sodium nitrite was used as a mild and efficient reagent for N-nitrosation of various tetrazoles, secondary amines, and amides under ambient conditions. Nitrosation took place chemoselectively at the nitrogen atom, giving corresponding N-nitroso derivatives in good to excellent yield. 相似文献
20.
A simple and selective copper(II) chloride-mediated monochlorination of anilines and nitrogen-containing heterocycles has been developed. Stirring a mixture of aniline, copper(II) chloride, lithium chloride in EtOH under reflux condition produced 4-chloroaniline with high yield. Eighteen substrates including substituted anilines, N-substituted anilines, N,N-disubstituted anilines, 5-nitroindole and carbazole were all reactive and afforded desired products in moderate to excellent yields (52%–98%). 相似文献