Salts of tricyanomethane and related compounds and derived heterocycles

The reactions of salts of a group of related carbon acids with nucleophiles have been investigated. These acids were tricyanomethane, dicyanoacetamide and N-substituted dicyanoacetamides, and esters of dicyanoacetic acid and dicyanothiolacetic acid. Amines added to one of the cyano groups to give N-...

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Main Author: Judson, Philip Neville
Published: University of Surrey 1977
Online Access:https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.751786
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spelling ndltd-bl.uk-oai-ethos.bl.uk-7517862018-10-09T03:26:03ZSalts of tricyanomethane and related compounds and derived heterocyclesJudson, Philip Neville1977The reactions of salts of a group of related carbon acids with nucleophiles have been investigated. These acids were tricyanomethane, dicyanoacetamide and N-substituted dicyanoacetamides, and esters of dicyanoacetic acid and dicyanothiolacetic acid. Amines added to one of the cyano groups to give N-substituted derivatives of 1,1-diaminoethylenes. Hydrogen chloride gave 1-amino-1-cnloro-ethylenes, which reacted with alcohols to give 1-alkoxy-1-aminoethylenes. Hydrazines added to two cyano groups to give 3,5-diaminopyrazoles, except with hydroxyiminomalononitrile, which decomposeo. The initial products of reaction with o-phenylenediamines generally cyclised, with loss of ammonia, to give benzimidazolines. The products of reactions with anthranilic acid cyclised, with loss of water, to give 4-(1H)-quinazolinones. For comparison, 1-alkylamino-1-arylaminoethylenes were prepared by a two-step synthesis from bis-(methylthio)-methylene derivatives of malono-nitrile, cyanoacetamide and cyanoacetic esters. 5-Amino-1-methyl-3-methylthio, and 3-amino-1-methyl-5-methylthio, pyrazole-4-carbonitriles were prepared from methyl hydrazine and bis-(methylthio)-methylenemalononitrile, which was also used to prepare 1-alkyl-3-amino-5-alkylaminopyrazole-4-carbonitriles by a three-step synthesis. These pyrazoles reacted with acid chlorides, followed by aqueous alkali, to give 3-methylthio-, and 3-alkylamino-, 5H-pyrazolo-(3,4-d)-pyrimidin-4-ones. The 3,5-diaminopyrazole-4-carbonitriles, prepared from hydrazines and tricyanomethane, reacted with carboxylic acids, or acid chlorides followed by aqueous alkali, to give 3-amino-5H-pyrazolo-(3,4-d)-pyrimidin-4-ones. The 3,5-diaminopyrazole-4-carboxamides, prepared from hydrazines and dicyanoacetamide, reacted similarly with carboxylic acids. Usually, if 1-alkylpyrazoles were used, 2-alkylpyrazolopyrimidinones were formed, rather than the 1-alkyl isomers. The structure of one such product, 3-amino-6-(1,1-dimethylethyl)-2-methyl-5H-pyrazolo-(3,4-cj)-pyrimidin- 4-one, was proved by X-ray crystallography. The structures of other pyrazolopyrimidinones were established by analogy and comparison with this one.University of Surreyhttps://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.751786http://epubs.surrey.ac.uk/847579/Electronic Thesis or Dissertation
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description The reactions of salts of a group of related carbon acids with nucleophiles have been investigated. These acids were tricyanomethane, dicyanoacetamide and N-substituted dicyanoacetamides, and esters of dicyanoacetic acid and dicyanothiolacetic acid. Amines added to one of the cyano groups to give N-substituted derivatives of 1,1-diaminoethylenes. Hydrogen chloride gave 1-amino-1-cnloro-ethylenes, which reacted with alcohols to give 1-alkoxy-1-aminoethylenes. Hydrazines added to two cyano groups to give 3,5-diaminopyrazoles, except with hydroxyiminomalononitrile, which decomposeo. The initial products of reaction with o-phenylenediamines generally cyclised, with loss of ammonia, to give benzimidazolines. The products of reactions with anthranilic acid cyclised, with loss of water, to give 4-(1H)-quinazolinones. For comparison, 1-alkylamino-1-arylaminoethylenes were prepared by a two-step synthesis from bis-(methylthio)-methylene derivatives of malono-nitrile, cyanoacetamide and cyanoacetic esters. 5-Amino-1-methyl-3-methylthio, and 3-amino-1-methyl-5-methylthio, pyrazole-4-carbonitriles were prepared from methyl hydrazine and bis-(methylthio)-methylenemalononitrile, which was also used to prepare 1-alkyl-3-amino-5-alkylaminopyrazole-4-carbonitriles by a three-step synthesis. These pyrazoles reacted with acid chlorides, followed by aqueous alkali, to give 3-methylthio-, and 3-alkylamino-, 5H-pyrazolo-(3,4-d)-pyrimidin-4-ones. The 3,5-diaminopyrazole-4-carbonitriles, prepared from hydrazines and tricyanomethane, reacted with carboxylic acids, or acid chlorides followed by aqueous alkali, to give 3-amino-5H-pyrazolo-(3,4-d)-pyrimidin-4-ones. The 3,5-diaminopyrazole-4-carboxamides, prepared from hydrazines and dicyanoacetamide, reacted similarly with carboxylic acids. Usually, if 1-alkylpyrazoles were used, 2-alkylpyrazolopyrimidinones were formed, rather than the 1-alkyl isomers. The structure of one such product, 3-amino-6-(1,1-dimethylethyl)-2-methyl-5H-pyrazolo-(3,4-cj)-pyrimidin- 4-one, was proved by X-ray crystallography. The structures of other pyrazolopyrimidinones were established by analogy and comparison with this one.
author Judson, Philip Neville
spellingShingle Judson, Philip Neville
Salts of tricyanomethane and related compounds and derived heterocycles
author_facet Judson, Philip Neville
author_sort Judson, Philip Neville
title Salts of tricyanomethane and related compounds and derived heterocycles
title_short Salts of tricyanomethane and related compounds and derived heterocycles
title_full Salts of tricyanomethane and related compounds and derived heterocycles
title_fullStr Salts of tricyanomethane and related compounds and derived heterocycles
title_full_unstemmed Salts of tricyanomethane and related compounds and derived heterocycles
title_sort salts of tricyanomethane and related compounds and derived heterocycles
publisher University of Surrey
publishDate 1977
url https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.751786
work_keys_str_mv AT judsonphilipneville saltsoftricyanomethaneandrelatedcompoundsandderivedheterocycles
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