An efficient enantioselective synthesis of indicine N-oxide, an antitumor pyrrolizidine alkaloid
作者:Takeshi Ogawa、Haruki Niwa、Kiyoyuki Yamada
DOI:10.1016/s0040-4020(01)80345-8
日期:——
Indicine N-oxide (1), a pyrrolizidine alkaloid potentially useful for an anticancer drug was synthesized in the natural form through regioselective coupling of (+)-retronecine (2) and the protected necic acids 16a and 16b, the latter being efficiently prepared from the optically pure lactone 5.