UV spectra of carbonyl-contaiming furan compounds

The optical absorption maxima in the UV spectra of furan aldehydes, ketones, acids and their derivatives — acid chlorides, anhydrides, esters, and diacyl peroxides ^– can be arranged in an order similar to the order of reactivities of the carbonyl groups. The effect of a solvent on the position of _max was examined.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 590–594, May, 1973.     

Synthesis of triaza-2- cyclohexene derivatives

Di- and trialkyl derivatives of 1,3,4-triaza-2-cyclohexene were synthesized by reaction of N,N'-dimethylethyleneaminohydrazine with monocarboxylic acid and their anhydrides, esters, amides, and hydrazides. Alkyl derivatives of ,-bis [2-(1,3,4-triaza-2-cyclohexenyl)]alkanes were obtained as a result of the reaction of N,N'-dimethylethyleneaminohydrazine with dicarboxylic acids and their derivatives. 1-Ammo-1,3,4-triaza-2-cyclohexene derivatives were obtained from ethylenedihydrazine and monocarboxylic acid esters.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 127–129, January, 1977.     

Amino acid derivatives of 2-R-7-hydroxy-3′,4′-ethylenedioxyisoflavones

A number of 7-O-aminoacyl derivatives of isoflavones have been obtained by the interaction of 2-R-7-hydroxy-3,4-ethylenedioxyisoflavones with the symmetrical anhydrides of N-protected amino acids.Kiev Tara Shevshenko University, Ukraine, 252033, Kiev, Ul. Vladimirskaya, 64, tel./fax 225-12-73. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 334–338, May–June, 1999.     

Scission of oxiranes by acid anhydrides to unsaturated alcohol esters

The reactions of some 1-R-3-methyl-2,3-epoxybutanes with acetic and propionic anhydrides takes place at 140–160C, regioselectively, with the formation of -metallyl alcohol esters.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 309–312, March, 1989.     

Preparation of 3-substituted isocoumarins in the reactions of homophthalic anhydride and its derivatives

Acetylation of 4-nitrohomophthalic anhydride gave 4-acetyl-7-nitroisochroman-1,3-dione, which was converted to 3-methyl-7-nitroisocoumarin. 3-Benzylisocoumarin derivatives were synthesized by reaction of homophthalic anhydrides with arylacetic acids in acetic anhydride and triethylamine.Communication XXVIII from the series Condensation of Dicarboxylic Acid Anhydrides with Compounds Containing Active Methylene Groups. See [1] for communication XXVII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1487–1489, November, 1977.     

Reaction of β-aroylacrylic acids with 1-substituted 3,4-dihydroisoquinolines

The reactions of -aroylacrylic acids and their methyl esters with 1-methyl- and 1-benzyl-3,4-dihydroisoquinolines lead to the formation of -substituted -aroylpropionic acids and their esters, which undergo cyclization to benzopyrrocolinone derivatives.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 943–945, July, 1979.     

Convenient method for preparation of esters of N-carbonyl-α-amino acids

Conclusions A convenient method was proposed for obtaining the esters of N-carbonyl--amino acids, which is based on the reaction of the esters of N-trimethylsilyl--amino acids with phosgene in the presence of a tertiary amine.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1682–1684, July, 1977.     

Electrochemical cyclization of tetramethyl esters of 2-substituted propane-1,1,3,3-tetracarboxylic acids in the presence of salts of hydrohalic acids

The chemical and electrochemical cyclization of tetramethyl esters of 2-substituted propane-1,1,3,3-tetracarboxylic acids in the presence of hydrohalic acid salt mediators were studied. It was found that the chemical variant of the cyclization of the corresponding ,'-dianions of esters of propane-1,1,3,3-tetracarboxylic acids by the action of iodine or bromine is substantially inferior to the electrochemical variant. In the latter case, the esters of substituted cyclopopane-1,1,2,2-tetracarboxylic acids are formed in a 87–98% yield. The tetramethyl ester of 2-isopropylpropane-1,1,3,3-tetracarboxylic acid, which under the electrolysis conditions decomposes according to a Michael retroreaction is an exception.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2783–2789, December, 1990.     

Esters of thioacids of trivalent phosphorus

Conclusions The acid halides of the esters of thiophosphonous acids react with,-unsaturated ketones to give 2-thiono-1,2-oxa-4-phospholene derivatives.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2765–2768, December, 1972.     

Reaction of anhydrides of dicarboxylic acids of six-membered nitrogen heterocycles with CH-acid compounds

Condensation products with azaphthalidylidene structures were obtained by the reaction of anhydrides of cinchomeronic and pyrazine-2,3-dicarboxylic acids with malonic ester, thiazolidine-2,4-dione, N-phenylthiazolidine-2,4-dione, and rhodanine. Azaindan-1,3-dione derivatives were synthesized with cyanoacetic ester and malononitrile under the same conditions. The reaction of these anhydrides, as well as quinolinic acid anhydride, with - and -methylquinolines, as well as 2,6-lutidine, gave compounds that have azaphthalidylidene structures, which were converted to azaquino- and pyrophthalones by the action of sodium methoxide.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1127–1131, August, 1981.     

Organophosphorus derivatives ofβ-ethyleniminoethanol

Conclusions We were the first to obtain the-ethyleniminoethyl esters of dialkylphosphorous and alkylphosphorous acids, and some of their reactions were studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1624–1625, July, 1974.     

Synthesis of (2,4-dimethyl-3-carbethoxy-5-pyrrolyl) succinic acid and its derivatives

-Pyrrolylsuccinic and (2,4-dimethyl-3-carbethoxy-5-pyrrolyl)succinic anhydrides were obtained by the reaction of pyrrole and 2,4-dimethyl-3-carbethoxypyrrole with maleic anhydride. (2,4-Dimethyl-3-carbethoxy-5-pyrrolyl)succinic acid and its imides and dialkylamides were synthesized by hydrolysis and aminolysis of the anhydrides.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1523–1524, November, 1972.     

Synthesis of ɛ-caprolactams and their reduction to azacycloheptanes

Conclusions 7-Propylcaprolaetam and its homologs have been prepared by reductive animation of esters of f -keto-pelargonic acids; these lactams have been reduced to the corresponding azcycloheptanes with lithium aluminum hydride.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2773–2774, December, 1967.     

Synthesis of estees of δ-aminopentadiene-carboxylic acids

Conclusions We synthesized some esters of-aminopentadienecarboxylic acids, which had an electron-acceptor substituent in the-position, and also some N-alkyl-3-carbamoyl-2-pyridones.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2008–2012, September, 1973.     

Synthesis of esters of oxocaprylic acids

Conclusions On hydrogenation over Pt-C in the vapor phase (240–250°), esters of -(5-methylfuryl)-propionic acids undergo hydrogenolysis of the C-O bond in the furan ring and are converted into the corresponding esters of-oxocaprylic acid (35–50%) and-oxocaprylic acid (25–35%).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 420–422, February, 1967.     

Choline esters of alkylenebisphosphonic acids

The reaction of the acid chlorides of alkylenebisphosphonic acids with ethylene glycol and ethylene chlorohydrin gave ethylene glycol and -chloroethyl esters of alkylenebisphosphonic acids. The quaternization of these products leads to choline esters of alkylenebisphosphonic acids.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1424–1429, June, 1990.     

Investigation of nitrogen- and sulfur-containing heterocycles

A number of derivatives of a new heterocyclic system — pyrimido[5,4-b][1,4]-7-oxazinone- were obtained by the reaction of substituted 5-hydroxy-6-aminopyrimidines with ethyl esters of-halocarboxylic acids.See [1] for communication XXIII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1285–1288, September, 1972.     

Preparative synthesis of functionally substituted esters of dehydroabietic and 4,4′-biphenyldicarboxylic acids

A preparative synthesis of functionally substituted esters of dehydroabietic and 4,4-biphenylcarboxylic acids by the reaction of chlorides of these acids with alcohols in the presence of pyridine is developed. 4,4-Biphenyldicarbonyl dichloride reacts with hydroperoxides to form peroxy esters and with lithium alcoholates, which allows preparation of the corresponding ethers derived from secondary and tertiary alcohols.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 8, 2004, pp. 1360–1364.Original Russian Text Copyright © 2004 by Dikusar, Yuvchenko, Kozlov, Olkhovik, Potkin.This revised version was published online in April 2005 with a corrected cover date.     

On the mechanism of formation of 1,1-dimethylpyrazolin-3-oxides

Conclusions The primary product during the acylation of N,N-dimethylhydrazine with anhydrides of,-unsaturated acids is the N,N-dimethylhydrazide of the acid, which at elevated temperatures rearranges to its tautomer — the corresponding 1,1-dimethylpyrazolin-3-oxide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 917–918, April, 1970.`     

Mono- and dihalogenofurfurals in the wittig reaction

The reaction of 3(5)-monohalogeno- and 4,5-dihalogenofurfurals with alkoxycarbonylmethyl-enetriphenylphosphoranes has given esters of - [3(5)-mono- and -4,5-dihalogeno-2-furyl]-acrylic acids, which are converted by alkaline hydrolysis into the corresponding halogen-substituted furylacrylic acids.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 870–872, July, 1973.