Ketenimine-nitrile rearrangements of N-alkoxyketenimines under their generation conditions
摘要:
C,C-Substituted N-ethoxyketenimines are extremely unstable even under their generation conditions (dehydrochlorination of N-ethoxyimidoyl chlorides, dehalogenation of alpha-bromo-N-ethoxyimidoyl halides, the reaction of methylmethoxycarbonylketene with N-ethoxytriphenylphosphinimine) undergo two types of rearrangements: synchronous ring decomposition down to acetaldehyde and the corresponding CH-nitrile and 1,3-migration of the EtO group with formation of alpha-ethoxynitriles. We suggest that the instability of N-alkoxyketenimines is mainly due to weakening of the NO bond as a result of pi(CC)-sigma(NO)* hyperconjugation.
Ketenimine-nitrile rearrangements of N-alkoxyketenimines under their generation conditions
摘要:
C,C-Substituted N-ethoxyketenimines are extremely unstable even under their generation conditions (dehydrochlorination of N-ethoxyimidoyl chlorides, dehalogenation of alpha-bromo-N-ethoxyimidoyl halides, the reaction of methylmethoxycarbonylketene with N-ethoxytriphenylphosphinimine) undergo two types of rearrangements: synchronous ring decomposition down to acetaldehyde and the corresponding CH-nitrile and 1,3-migration of the EtO group with formation of alpha-ethoxynitriles. We suggest that the instability of N-alkoxyketenimines is mainly due to weakening of the NO bond as a result of pi(CC)-sigma(NO)* hyperconjugation.
[EN] BENZIMIDAZOLE DERIVATIVES AND USES THEREOF<br/>[FR] DÉRIVÉS DE BENZIMIDAZOLE ET LEURS UTILISATIONS
申请人:PELOTON THERAPEUTICS INC
公开号:WO2015175845A1
公开(公告)日:2015-11-19
Benzimidazole derivatives of Formula I, that modulate the activity of ACSS2 are disclosed for therapeutic use. The fused imidazole ring of the compounds disclosed has a diarylmethyl or diarylmethanol moiety attached at the 2-position and the compounds have at least one other substituent at the 5 or 6 position of the benzimidazole. Also disclosed are methods of using the benzimidazole compounds for the treatment of diseases or disorders, such as cancer.
Ketenimine-nitrile rearrangements of N-alkoxyketenimines under their generation conditions
作者:G. V. Shustov、A. V. Kachanov、R. G. Kostyanovskii
DOI:10.1007/bf00863370
日期:1992.11
C,C-Substituted N-ethoxyketenimines are extremely unstable even under their generation conditions (dehydrochlorination of N-ethoxyimidoyl chlorides, dehalogenation of alpha-bromo-N-ethoxyimidoyl halides, the reaction of methylmethoxycarbonylketene with N-ethoxytriphenylphosphinimine) undergo two types of rearrangements: synchronous ring decomposition down to acetaldehyde and the corresponding CH-nitrile and 1,3-migration of the EtO group with formation of alpha-ethoxynitriles. We suggest that the instability of N-alkoxyketenimines is mainly due to weakening of the NO bond as a result of pi(CC)-sigma(NO)* hyperconjugation.