pentanones followed by dehydration, 1,4-reduction of the triene, ozonolysis and Baeyer-Villiger oxidation afforded a δ-lactone (28 % of overall yield), well-known precursor of the Prelog-Djerassi Lactone.
将
巴豆基
格氏试剂立体选择性加入2-亚烷基-5-甲基
环戊酮中,然后脱
水,
三烯进行1,4-还原,
臭氧分解和Baeyer-Villiger氧化,得到了δ-内酯(占总收率的28%) Prelog-Djerassi内酯的前体。