共查询到20条相似文献,搜索用时 31 毫秒
1.
Summary Six acetylenic-diols were prepared for the first time from 3-butyn-2-ol and aliphatic ketones by the Favorskii reaction. 相似文献
2.
3.
4.
Yu. B. Salamonov O. A. Luk'yanov A. G. Bass Yu. A. Strelenko 《Russian Chemical Bulletin》1994,43(11):1860-1863
Previously unknownN-dinitroalkyl-NNO-azoxybenzenes have been prepared (by nitration ofN-(-hydroximino) alkyl-NNO-azoxybenzenes) and transformed to some derivatives.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1972–1975, November, 1994 相似文献
5.
Russian Chemical Bulletin - 相似文献
6.
《Tetrahedron letters》2019,60(20):1375-1378
This study reported a stereoselective synthesis of (+)/(+)-pentenomycin I in 4–5 steps through regioselective silylation, optical resolution and dihydroxylation, followed by an olefin formation, from a known racemic cyclopentenone prepared from 2-deoxy-d-glucose. We also accomplished the transformation of a common intermediate into a variety of analogs. In addition, the antimicrobial activities of the pentenomycin analogs were evaluated, which revealed important structural factors of pentenomycins for the antimicrobial activities. 相似文献
7.
《Tetrahedron》1996,52(25):8413-8438
Treatment of 5-(arylimino)-4-(dialkylamino)-5H-1,2,3-dithiazoles (2) with NaOH in aqueous EtOH at room temperature gave N′-arylthiocarbamoyl-N,N-dialkylamidines (3) in good to excellent yields. The reaction of 3 with sulfur monochloride, thiophosgene, thionyl chloride, sulfuryl chloride, N-phenylimidoyl dichloride, and phthaloyl chloride in CH2Cl2 gave 2, 5-(arylimino)-4-(dialkylamino)-Δ3-thiazoline-2-thiones (5), 5-(arylimino)-4-(dialkylamino)-5H-2-oxo-1,2,3-dithiazoles (6), 5-(arylimino)-4-(dialkylamino)-5H-2,2-dioxo-1,2,3-dithiazoles (7), 5-(arylimino)-4-(dialkylamino)-2-(phenylimino)-Δ3-thiazolines (8), and 3-(arylimino)-4-(dialkylamino)-2,5-benzothiazocine-1,6-diones (10) as major products, respectively. 相似文献
8.
L. M. Likhosherstov O. S. Novikova A. O. Zheltova V. N. Shibaev 《Russian Chemical Bulletin》2000,49(8):1454-1459
A convenient preparative procedure was developed for the synthesis ofN-glycyl-β-glycopyranosylamines, derivatives of monosaccharides (d-galactose,d-mannose,l-fucose, andN-acetyl-d-glucosamine) and disaccharides (lactose, melibiose, cellobiose, and maltose). These compounds were demonstrated to be useful
for the preparation of glycoconjugates of biologically active compounds containing the carboxy group (nicotinic, orotic, kynurenic,
and indoleacetic acids). Synthetic pathways were developed for conversions ofN-glycyl-β-glycopyranosylamines into derivatives containing the carboxy group with the use of malonic andl-tartaric acid derivatives.
Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1461–1466, August, 2000. 相似文献
9.
The interaction of cyclopentanone, 2-cyclopentenone, 1,3-cyclopentanedione, 3-methyl-1,2-cyclopentanedione, γ-butyrolactone, 2(5H)-furanone, ascorbic acid, and 5,6-O-isopropylidenyl-2,3-O-dimethylascorbic acid with α-hydroxyethyl radicals (α-HER) generated during the radiolysis of deaerated ethanol has been studied in the continuous irradiation mode. The test compounds, except γ-butyrolactone, oxidize α-HER. 2(5H)-Furanone and 2-cyclopentenone give hydroxyethylation products via the free-radical chain mechanism. In contrast to 2(5H)-furanone and 2-cyclopentenone, ascorbic and 5,6-O-isopropylidenyl-2,3-O-dimethyl-L-ascorbic acids are weaker oxidants for α-HER and attach these radicals at the multiple carbon-carbon bonds. 相似文献
10.
A series of aluminium iminophosphoranylenamide complexes, [Me(2)Al{N(Ar)C(Ph)=CHP(Ph(2))=N-Ar(1)}] (Ar = Ph, Ar(1) = p-MeC(6)H(4) (9); Ar = Ph, Ar(1) = o-ClC(6)H(4) (10); Ar = Ph, Ar(1) = o-FC(6)H(4) (11); Ar = p-MeC(6)H(4), Ar(1) = o-FC(6)H(4) (12)), were synthesised by the reactions of ArN=C(Ph)CH(2)P(Ph(2))=NAr(1) (5-8) with AlMe(3) in toluene. Similar reactions between o-{ArN=P(Ph(2))}C(6)H(4)NHC(Ph)=CHP(Ph(2))=NAr (Ar = p-MeC(6)H(4), 13), and AlMe(3) in toluene generates aluminium iminophosphoranylanilide, 14. All new compounds were characterised by NMR spectroscopy and elemental analysis. The molecular structures of complexes 9 and 14 were further characterised by single-crystal X-ray structure determination. In the presence of benzyl alcohol (BnOH) each of the complexes is catalytically active for the ring-opening polymerisation (ROP) of ε-caprolactone (ε-CL), and complex 14 has the highest activity among them. 相似文献
11.
E. B. Rakhimova R. A. Ismagilov R. A. Zainullin N. F. Galimzyanova A. G. Ibragimov 《Russian Journal of Applied Chemistry》2013,86(10):1504-1508
A procedure was developed for preparative synthesis of α,ω-bis-1,5,3-dithiazepanes by heterocyclization of aliphatic α,ω-diamines with N,N,N′,N′-tetramethylmethanediamine and 1,2-ethanedithiol. The fungicidal activity of 1,2-bis(1,5,3-dithiazepan-3-yl)ethane and 3,3′-(3,6-dioxaoctane-1,8-diyl)bis-1,5,3-dithiazepane toward microscopic fungi affecting agricultural plants was studied. 相似文献
12.
Vchislo Nadezhda V. Verochkina Ekaterina A. 《Chemistry of Heterocyclic Compounds》2022,58(8-9):384-393
Chemistry of Heterocyclic Compounds - The methods for the synthesis of quinoline and its hydrogenated derivatives from α,β-unsaturated aldehydes have been summarized for the first time.... 相似文献
13.
Summary Starting from the corresponding-chloro carboxylic acids we prepared, -imino dicarboxylic acids and their N- and O- derivatives; the products had the following structures: 相似文献
14.
Jean-Luc Pirat Jean Marc Lambert Henri-Jean Cristau 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract A procedure for the preparation of N-protected 1 or unprotected Ca,a-disubstituted (diarylaminomethyl)-phosphonic acids and their esters is reported.1 This method is a generalisation of the Kabachnik-Fields method described in the literature.2 相似文献
15.
16.
Highly regioselective transformations of the acyclic α,ω-terpenediols and their diacetates to the monoacetates using lipase were accomplished. The acetylation of the α,ω-terpenediols gave regioselectively the ω-monoacetates 3, whereas the α-monoacetates 2 were obtained by hydrolysis of the α,ω-diacetates. 相似文献
17.
ChaoCHAI FeiYE 《中国化学快报》2004,15(10):1167-1169
Two N-dichloroacetyl oxazolidines were synthesized with a simple, mild and convenient method. All the compounds were characterized by IR, ^1HNMR and elemental analysis. The preliminary biological test showed that the compounds protected maize against injury by some herbicides to some extent. 相似文献
18.
Momin A Bonnet F Visseaux M Maron L Takats J Ferguson MJ Le Goff XF Nief F 《Chemical communications (Cambridge, England)》2011,47(44):12203-12205
The new divalent thulium compound [Tm(BH(4))(2)(DME)(2)] could be prepared by reduction of [Tm(BH(4))(3)(THF)(3)] or from TmI(2) and KBH(4). It was used as a precursor to the divalent [(Tp(tBu,Me))Tm(BH(4))(THF)] by reaction with potassium tris(2-tBu-4-Me)pyrazolylborate (KTp(tBu,Me)). Both Tm(II) compounds were found active as ε-caprolactone polymerisation catalysts. 相似文献
19.
20.
Shamim Ahmad Khan Shahnawaz Ahmad Bhat Shahab A.A. Nami Abdul Kareem Nahid Nishat 《Comptes Rendus Chimie》2018,21(9):872-879
Coordination polymers were obtained by the reaction of metal acetates, M(CH3COO)2·xH2O {where M = Mn(II), Co(II), Ni(II) and Cu(II)} with AFP ligand (AFP = 5,5'-(piperazine-1,4-diylbis(methylene))bis(2-aminobenzoic acid). The AFP ligand was prepared by the one-pot, two-step reaction of formaldehyde, 2-aminobenzoic acid, and piperazine. Structural and spectroscopic properties have been studied by elemental, spectral (FT-IR, 1H NMR, 13C NMR, and UV–vis), and thermogravimetric analysis. UV–vis spectra and magnetic moment values indicate that Mn(II), Co(II), and Ni(II) polymer–metal complexes are octahedral, while Cu(II) and Zn(II) polymer–metal complexes are distorted octahedral and tetrahedral, respectively. The analytical data confirmed that the coordination polymers of Mn(II), Co(II), Ni(II), and Cu(II) are coordinated with two water molecules, which are further supported by infrared spectra and thermogravimetric analysis data. The prepared polymer–metal complexes showed good antibacterial activities against all tested microorganisms; however, the AFP ligand was also found to be effective, but relatively less than their polymer–metal complexes. Along with antibacterial activity, all the polymer–metal complexes exhibit significant antifungal activity against most of the tested fungal strains. The results of antimicrobial activity reveals that the AFP–Cu(II) showed the highest antibacterial and antifungal activity than other polymer–metal complexes. 相似文献