Transformations of tetrahydro-1,4-benzoxazepines and tetrahydro-1,4-benzothiazepines under the action of alkynes. First example of the synthesis of tetrahydro-1,4-benzothiazonine-6-carboxylate
摘要:
It was shown that 2,3,4,5-tetrahydro-1,4-benzoxazepines were cleaved at the N-C(5) bond under the action of activated alkynes in methanol, forming o-(methoxyethyl)- and o-(methoxybenzyl)-phenyl(aminoethyl) ethers. The cleavage rate depended on the electronic effects of the substituents at the C-5 atom. Thiazepine ring expansion in tetrahydro-1,4-benzothiazepine was achieved for the first time via reaction with methyl propiolate to give a benzothiazonine.
Transformations of tetrahydro-1,4-benzoxazepines and tetrahydro-1,4-benzothiazepines under the action of alkynes. First example of the synthesis of tetrahydro-1,4-benzothiazonine-6-carboxylate
摘要:
It was shown that 2,3,4,5-tetrahydro-1,4-benzoxazepines were cleaved at the N-C(5) bond under the action of activated alkynes in methanol, forming o-(methoxyethyl)- and o-(methoxybenzyl)-phenyl(aminoethyl) ethers. The cleavage rate depended on the electronic effects of the substituents at the C-5 atom. Thiazepine ring expansion in tetrahydro-1,4-benzothiazepine was achieved for the first time via reaction with methyl propiolate to give a benzothiazonine.
Transformations of tetrahydro-1,4-benzoxazepines and tetrahydro-1,4-benzothiazepines under the action of alkynes. First example of the synthesis of tetrahydro-1,4-benzothiazonine-6-carboxylate
作者:L. G. Voskressensky、S. V. Akbulatov、T. N. Borisova、L. N. Kulikova、A. V. Listratova、E. A. Sorokina、A. V. Varlamov
DOI:10.1007/s10593-013-1251-z
日期:2013.5
It was shown that 2,3,4,5-tetrahydro-1,4-benzoxazepines were cleaved at the N-C(5) bond under the action of activated alkynes in methanol, forming o-(methoxyethyl)- and o-(methoxybenzyl)-phenyl(aminoethyl) ethers. The cleavage rate depended on the electronic effects of the substituents at the C-5 atom. Thiazepine ring expansion in tetrahydro-1,4-benzothiazepine was achieved for the first time via reaction with methyl propiolate to give a benzothiazonine.