Reaction of 3-Alkanoylquinoxalin-2-Ones with Ammonium Acetate in DMSO – A New Method for the Synthesis of Pyrroles
摘要:
The interaction of 3-alkanoylquinoxalin-2-ones with NH4OAc in DMSO at 105-120A degrees D produced pyrrole derivatives according to a novel [D-2+N+D-2] scheme, while the -(CO)-CH2- fragment of the substituent at position 3 of the quinoxalinones served as the source of two-carbon fragments D(2)-D(3) and D(4)-D(5), and the nitrogen source was NH4OAc.
Synthesis of 3-alkylquinoxalin-2(1H)-ones via Grignard reaction
作者:A. A. Kalinin、V. A. Mamedov
DOI:10.1134/s1070428009070185
日期:2009.7
A two-step procedure has been developed for the synthesis of 3-alkylquinoxalin-2(1H)-ones from o-phenylenediamine and ethyl 2-oxoalkanoates prepared by the Grignard reaction of diethyl oxalate with alkyl bromides. Analogous reaction with alpha,omega-dibromoalkanes instead of alkyl bromides leads to the formation of 3,3'-(alkane-alpha,omega-diyl)di[quinoxalin-2(1H)-ones].