2-{(4a′S,6a′S,10a′R,10b′R)-Octahydrospiro[1,3-dioxolane-2,2′-pyrano[2,3-c]chromen]-6a′(1′H)-yloxy}ethanol in the Synthesis of (2S)- and (2R)-Dodecane-1,2-diols

Russian Journal of Organic Chemistry - Michael adduct of levoglucosenone and cyclohexanone, 1,6-anhydro-3,4-dideoxy-4-C-(2-oxocyclohexan-1-yl)-β-D-erythrohexo-2-ulose, was treated with...     

Synthesis of 1,3,4-thiadiazolo[3′,2′∶1,2]pyrimidino[5,6-d]-1,3-thiazine derivatives

2-R-5-Imino-6H-1,3,4-thiadiazolo[3,2-a]pyrimidin-7-ones react with aromatic and heterocyclic aldehydes in the presence of Et₃N to give condensation products on the methylene group, which react with carbon disulfide to yield the corresponding 2,6-disubstituted 8-thioxo-9,9a-dihydro-1,3,4-thiadiazolo[3′,2′∶1,2]pyrimidino[5,6-d]1,3-thiazin-5-ones. Deceased. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 366–368, February, 1999.     

Synthesis and Reactivity of 2-(Furan-2-yl)benzo[1,2-d:4,3-d′]bis[1,3]thiazole

Russian Journal of Organic Chemistry - Acylation of 1,3-benzothiazol-6-amine with furan-2-carbonyl chloride in propan-2-ol gave N-(1,3-benzothiazol-6-yl)furan-2-carboxamide which was converted to...     

Synthesis and Structural Characterization of a New Hydrogen-bonded Polyrotaxane of [Co(H_2O)_6]_(2 ) with 1,1′-(Propane-1,3-diyl)dipyridinium-4-carboxylate

1 INTRODUCTION Hydrogen bonding, one of the better unders- tood types of non-covalent interactions[1～4], is a powerful organizing force in designing solids for several reasons: it is directional, selective and its formation is reversible at room temperature[5, 6]. Via hydrogen bonding, molecules or ions can be assembled as one- or poly-dimensional molecular assembly, which is the important research in therelevant fields of supramolecular chemistry and crystal engineering[7～9]. At present…     

Synthesis,Characterization and Biological Activity of (Z)-1-[2-(Triphenylstannyl]Cyclopentanol and Their Phenylhalostannyl Derivativies

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｉｏｄｏｄｅｍｅｔａｌａｔｉｏｎ［１］ｏｆｔｈｅｐｒｏｄｕｃｔｓｏｆｔｈｅｒｅａｃｔｉｏｎｓｂｅｔｗｅｅｎｔｒｉｐｈｅｎｙｌｔｉｎｈｙｄｒｉｄｅａｎｄｅｔｈｙｎｙｌ（ｈｙｄｒｏｘｙ）ｓｔｅｒｏｉｄｓ［２，３］ｙｉｅｌｄｓ...     

Synthesis and Characterization of a Novel Copoly(aryl ether ketone) Containing 4,4′-Biphenyl-bis[4-phthalazin-1(2H)-one] moiety

A new monomer of 4,4′-biphenyl-bis[4-phthalazin-1(2H)-one] was synthesized from biphenly and phthalic anhydride,and a novel copoly(aryl ether ketone)(PPEK) was synthesized from 2,2-bis(4-hydroxyphenyl)-propane(BPA),4,4′-biphenyl-bis-[4-phthalazin-1(2H)pne],4,4′-difluorodiphenylketone(DFK).The monomer and copolymer were characterized by FT-IR and ^1H-NMR.DSC and TGA were used to the novel polymer.     

Synthesis and crystal structures of two zinc(II) complexes derived from N-isopropyl-N′-[1-(2-methoxyphenyl)methylidene]ethane-1,2-diamine

Two isostructural mononuclear zinc(II) complexes, [ZnLBr₂] (I) and [ZnLI₂] (II), derived from the Schiff base N-isopropyl-N′-[1-(2-methoxyphenyl)methylidene]ethane-1,2-diamine (L), have been synthesized and characterized by elemental analysis, IR spectra, and X-ray single-crystal diffraction. The crystal of I is monoclinic: space group P2₁/n, a = 14.476(1) Å, b = 7.327(1) Å, c = 17.528(1) Å, β = 101.153(1)°, V = 1824.0(3) ų, Z = 4. The crystal of II is monoclinic: space group P2₁/n, a = 14.482(1), b = 7.329(1), c = 17.528(1)Å, β = 101.195(2)°, V = 1825.0(3)ų, Z = 4. The Zn atom in each complex is four-coordinated in a tetrahedral coordination, with one imine N and one amine N atoms of L, and two halide atoms. Both complexes and the Schiff base were tested in vitro for their antibacterial activities.     

Synthesis of Spiro[benzo[h]chromene-4,3′-indoles] and Spiro[benzo[f]chromene-1,3′-indoles]

Russian Journal of Organic Chemistry - New spiro heterocycles, spiro[benzo[h]chromene-4,3′-indoles] and spiro[benzo[f]chromene-1,3′-indoles], have been synthesized in 50–60% yield...     

Synthesis and Crystal Structure of 4,4′-(4-(1-Naphthyl)-4-phenyl- 1,3-butadienylidene)-bis[N,N-diethylbenzenamine]

The title compound (C40H42N2) has been synthesized by the reaction of 1-(1-naphthyl)-1-phenyl-3-chloropropylene and bis(4-(diethylamino) phenyl)methanone, and characterized by IR, 1H NMR, MS and X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 17.047(3), b = 10.807(2), c = 1&494(4) (A), β = 105.727(4)°, V=3279.4(11) A3, Mr = 550.76, Z = 4, Dc = 1.115 g/cm3, μ(MoKα) = 0.085 mm-1, F(000) = 1184, the final R = 0.0625 and wR = 0.1384 for 2276 observed reflections (I ＞ 2σ(Ⅰ)). X-ray analysis reveals that the butadiene fragment adopts a planar cisiod conformation and makes a dihedral angel of 69.4(2)° with the naphthalene ring.     

Synthesis and Characterization of 4′-Bromomethyl-2-(N-trityl-1H-tetrazol-5-yl) Biphenyl

Biphenyl tetrazole ring is an important component of the Sartan family of novel drugs. 4′-Bromomethyl-2-(N-trityl-1H-tetrazol-5-yl)biphenyl was synthesized in this article from 4′-methyl-2-cyano-biphenyl through three steps. 4′-Methyl-2-cyano-biphenyl was reacted with azide ions with the help of ammonium chloride as catalyst in an autoclave with high conversion to afford the tetrazole compounds in 70.6% yield. After being protected by the trityl group with 92.6% yield, 4′-methyl-2-(N-trityl-1H-tetrazol-5-yl) biphenyl was brominated with N-bromosuccinimide (NBS) in cyclohexane with 2,2′-azo-isobutyronitrile (AIBN) acting as an initiator to provide the title compound in 83.8% yield.     

Synthesis of novel spiro[indole-3,3′-pyrrolidin]-2(1H)-ones

Diastereoselective [3+2] cycloaddition of azomethine ylide to 1,3-dimethyl-6-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)-3a,9a-diphenyl-3,3a,9,9a-tetrahydroimidazo[4,5-e]thiazolo[3,2-b]-[1,2,4]triazine-2,7(1H,6H)-dione yields hitherto unknown 1,1′,3-trimethyl-3a,9a-diphenyl-3,3a,9,9a-tetrahydrodispiro(imidazo[4,5-e]thiazolo[3,2-b][1,2,4]triazine-6,3′-pyrrolidine-4′,3″-indole)-2,2″,7(1H,1″H)-triones.     

Synthesis and Luminescence of 14-Aryl- or Alkyl-14H-dibenzo[a,j]xanthenes Catalyzed by 2-1′-Methylimidazolium-3-yl-1-ethyl Sulfate

A facile and efficient synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes has been accomplished by treatment of β-naphthol with aryl or alkyl aldehydes catalyzed by 2-1′-methylimidazolium-3-yl-1-ethyl sulfate in ionic liquid [BMIM][BF₄] at 80°C. The luminescence of products was studied in detail.     

Synthesis of New 1Н-Pyrrolo[3,4-с]pyridine-1,3(2Н)-diones

Russian Journal of General Chemistry - A method for the synthesis of a series of new substituted 1H-pyrrolo[3,4-c]pyridine-1,3(2H)-diones was proposed based on the Diels–Alder type reaction...     

Synthesis and some transformations of trans-1-methyl-2-[β-(2′-thienyl)vinylene]-1H-benzimidazole

The condensation of 1,2-dimethylbenzimidazole with thiophene-2-aldehyde in the presence of fused zinc chloride results in 1-methyl-2-[β-(2-thienyl)vinylene]-1H-benzimidazole. Its electrophilic substitution reactions (nitration, bromination, sulfonation, formylation, acylation) were studied. All the reactions occur in the 5-position of the thiophene ring. Only in the case of bromination in dichloroethane 5′,5(6)-dibromo-derivative was obtained. Data of the quantum-chemical calculations of the total positive charge on the carbon atoms of the protonated molecules of thienylbenzimidazoles including the vinylene group and without it are reported.     

Montmorillonite K-10 clay catalyzed solvent-free synthesis of bis-indolylindane-1,3-dione, 2-(1′,3′-dihydro-1H-[2,3′]biindolyl-2′-ylidene)-indan-1,3-dione and bisindolylindeno[1,2-b]quinoxaline under microwave irradiation

An environmentally benign protocol has been described for the synthesis of novel 2-(1′,3′-dihydro-1H-[2,3′]biindolyl-2′-ylidene)-indan-1,3-diones/bis-indolylindane-1,3-diones from ninhydrin and 3-substituted/unsubstituted indoles. It uses montmorillonite K-10 as catalyst in a solvent-free condition under microwave irradiation. The method was also used for the synthesis of novel bisindolylindeno[1,2-b]quinoxaline derivatives.     

Synthesis and Characterization of Poly(methylsiloxane)S Containing 4-[S(-)-2-Methyl-1 -Butoxy1-4′ -[p-(ω-alkan-l-yloxy)benzoyloxy]-α-methylstilbene Side Groups

The syntheses of poly(methylsiloxane)s containing 4-[S(-)-L-methyl-1 -butoxy] -4′-[p-(ω -alkan -1 -yloxy)benzoyloxy] -a-methylstilbene side groups containing 11-undecanyl (18), 8-octyl (19), 6-hexyl (20), and 3-propyl (21), of a poly[(50-55%)-methyl-co-(45-50%)-dimethylsiloxane] containing 4-[S(-)-2-methyl-1-butoxy]-4′-[p-(8-octan-1-yloxy)benzoyloxy]-α-methylstilbene side groups (22) and of a poly(methylsiloxane) containing a 1:1 molar ratio of 4-[S(-)-2-methyl-1 -butoxyl]-4′ -[p-(8-octan-1 -yloxy)benzoyloxy] -α-methylstilbene and 4-[S(-)-2-methyl-l -butoxyl-4′ -[p-(6-hexan-1-yloxy)-benzoyloxyl-α-methylstilbene side groups (23) are described. All polymers and copolymers were characterized by a combination of differential scanning calorimetry and thermal optical polarized microscopy techniques. 18 exhibits an enantiotropic S _A, while 19, 20, 21, and 23 display both enantiotropic s _A and S*_c mesophases. 22 exhibits only an enantiotropic s: mesophase. In addition, all polymers and copolymers exhibit sidechain crystallization. These results have demonstrated that extending the length of the rigid part of the mesogenic unit of 4-[S(-)-2-methyl-l-butoxy]-4′-(ω-alkan-l-yloxy)-α-methylstilbene to 4-[S(-)-2-methyl-l-butoxy]-4′ -[p-(ω-alkan-l -yloxy)benzoyloxy]-α-methylstilbene increases the tendency of the resulting poly(methylsiloxane)s toward polymesomorphism.     

Synthesis and fungicidal activity of N,N′-dithol-4-yl-1,3,5-thiadiazinane and N,N′-[methylene-bis-(thiomethylene)]-bis-[4(5)-methyl-1,3-thiazole-2-amines]

Thiomethylation of para-toluidine and 4(5)-methyl-2-aminothiazoles was used to synthesize N,N′-dithol-4-yl-1,3,5-thiadiazinane and N,N′-[methylene-bis-(thiomethylene)]-bis-[4(5)-methyl-1,3-thiazole-2-amines]. A fungicidal and fungistatic effect toward some microscopic fungi, plant-disease-producing factor, was revealed for these compounds.     

Synthesis and Crystal Structure of (E)-[1-Ferrocenyl-2-(4-Chlorophenyl) ethylene]

1INTRoDUCTIoNCurrently,thereisaconsiderableinterestintheinvestigationoforganicandorganometallicmaterialsshowinglargenonlinearopticalresponse.Theirpotentialusehasbeenresearchedindeviceapplicationswhicharerelatedtothetelecommuni-cations,opticalcomputingandopticalinformationprocessing"2i.Onamicroscopiclevel,oneofthemajorphysicalparameterstodecidethenonlinearopticalpropertiesofmaterialsisthemolecularhyperpolarizability,avaluedeterminedbyelectronicandgeometricstructureofmolecule.Thetitlecompoun…     

Synthesis of New Spiro[1,4,2-dioxazole-5,3′-indolin]-2′-one by 1,3-Dipolar Cycloaddition

Novel spiro[1,4,2-dioxazole-5,3′-indolin]-2′-one derivatives were synthesized by 1,3-dipolar cycloaddition reactions of the isatin derivative with aryl nitrile oxide. The cycloadducts were characterized by spectral data including ¹H NMR, ¹³C NMR, infrared, mass spectra, and elementary analysis.     

Stereoselective Synthesis and Characterization of (Z)-(−)-4-(1′-Alkoxyl-1′-alkyloxycarbonyl-methylidene)-5(R)-[(1R)-menthyloxy]-γ-butyrolactones

Abstract

A series of enantiomerically pure (Z)-(?)-4-(1′-alkyloxy-1′-alkyloxycarbonyl-methylidene)-5(R)-[(1R)-menthyloxy]-γ-butyrolactones were synthesized and characterized in good to excellent yields via O-alkylation of (4R,5R)-(?)-4-ethoxyoxalyl-5-[(1R)-menthyloxy]-γ-butyrolactone with alkyl halides in the presence of K₂CO₃ in acetone at room temperature.