Carbon dioxide: A reagent for the protection of nucleophilic centres and the simultaneous activation of alternative locations to electrophilic attack.
作者:Alan R. Katritzky、Kunihiko Akutagawa
DOI:10.1016/s0040-4039(00)98265-0
日期:1985.1
derivatives by using carbondioxide both for N-protection and to give an intermediate carbanion stabilizing group. t-Butyllithium was used as a lithiating agent at the alpha-carbon atom of the indole enamino group. The resulting 2-substituted indole-1-carboxylic acids underwent smooth thermal decarboxylation under mild conditions. Alternatively, with longer reaction times the protecting group is lost during