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Report | Regular issue | Vol 22, No. 9, 1984, pp.2043-2046
Published online, 1st January, 1970
DOI: 10.3987/R-1984-09-2043
A Convenient Method for the Preparation of 3-Acetyl-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-one, a Key Intermediate for the Synthesis of Ajmalicine

Bhim C. Maiti and Satyesh C. Pakrashi*

*Indian Institute of Chemical Biology, Calcutta-700 032, India

Abstract

Reaction of 3,4-dihydro-β-carboline (1) and 3,4-dihydroisoquinoline (7a-b) with ethoxymethyleneacetylacetone (2a) and ethyl ethoxymethyleneacetoacetate (2b) yielded new tetra- and tricyclic compounds (4a-b, 8a-d). The enaminone 4a on NaBH4 reduction led to the title compound.