Synthesis of N-substituted pyrrole and tetrahydroindole derivatives from alkenyl β-dicarbonyl compounds
作者:Helena M.C Ferraz、Fernando L.C Pereira、Fátima S Leite、Marta R.S Nunes、M.Elena Payret-Arrúa
DOI:10.1016/s0040-4020(99)00625-0
日期:1999.9
to the formation of the corresponding pyrrole or tetrahydroindole derivatives. In the absence of base, the iodo-β-enamino esters 5 and 7 underwent spontaneous aromatization after dehydroiodination, furnishing the 4, 5, 6, 7-N-substituted-tetrahydroindoles 19 and 20. All the elimination reactions proceeded smoothly, in yields ranging from 71% to 99%. Starting from the β-allyl-dimedone 21, it was possible