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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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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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 |
_version_ |
1718772640680771584 |