PROCESS FOR PRODUCING PYRIPYROPENE DERIVATIVE

摘要

A process for efficiently producing a pyripyropene derivative having acyloxy groups in the 1- and 11- positions and a hydroxy group in the 7-position. The process comprises a step in which the hydroxy groups in the 1- and 11-positions of the compound represented by formula (B1) are selectively acylated with an acylating agent in the presence or absence of a base in one to three stages.