Facile Synthesis of 2,3,6,11-Tetrahydro-1H,5H-indolizino[8,7-<i>b</i>]indole-11<i>b</i>-Carboxylic Acid Methyl Ester via a 9-BBN-Mediated Tertiary Lactam Reduction
作者:Demosthenes Fokas、Zhimin Wang
DOI:10.1080/00397910802238684
日期:2008.10.22
facile synthesis of 2,3,6,11-tetrahydro-1H,5H-indolizino[8,7-b]indole-11b-carboxylic acid methyl ester, a versatile intermediate utilized in the synthesis of indole alkaloids, was achieved in two steps. Condensation of tryptamine with dimethyl α-ketoglutarate led to the formation of the corresponding indolizino[8,7-b]indolone ester, which subsequently underwent an efficient lactam reduction with 9-BBN
摘要 2,3,6,11-四氢-1H,5H-indolizino[8,7-b]indole-11b-羧酸甲酯是一种用于合成吲哚生物碱的通用中间体。两步。色胺与α-酮戊二酸二甲酯缩合形成相应的吲哚并[8,7-b]吲哚酮酯,随后用9-BBN进行有效的内酰胺还原,以良好的收率生成叔胺酯。