Estudo das reações de - diazocetonas com enaminonas

AUTOR(ES)
DATA DE PUBLICAÇÃO

1984

RESUMO

The reactions of 2-diazo-1,2-diphenylethanone (4) with enaminones RCOCH=C (CH3)NRR (1a-j) yelded a-(diphenylacetyl)-enaminones (Ph)2CHCO (RCO) C=C (CH3) NRR (10a-f) and a-diphenylacetamides (Ph)2CHCONRR (11a-e) through the eletrofilic attack of the diphenylketene (8) on the a-carbon or nitrogen of the enaminones. In the reaction with enaminone 1f (R=CH3CH2O, RR=H), 3-(1,1-diphenyl-acetylamino)-2-butenoic acid ethyl ester (12) was also obtained. The yields varied depending on the nitrogen or carbonyl substituents. The following observations were made for primary and secondary enaminones (R=H). For enaminoesters and enaminoketones the order of reactivity and proportion of 10: (11+12) was R=H

ASSUNTO(S)

aminas compostos de diazo

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