(+)−Vincamine (1) and (+)−vinpocetine (2) were chlorosulfonylated and the resulting sulfonyl chloride isomers (3–6) were transformed into sulfonamides (7–10). The ester group of sulfonamides was modified by selective hydrolysis and transesterification. Apovincaminol derivatives (14–16) were also prepared by reduction. In addition to the known cerebrovascular effects of the unsubstituted compounds (1