Cyclization of the olefinic β-hydroxy selenide (5) with various catalysts was carried out to give the cyclic compound (9) which was converted to safranal (19) via the olefinic alcohol (14), the diolefinic alcohol (16), and the aldehyde (17).
在各种催化剂的作用下,烯烃β-羟基
硒化物(5)发生环化反应,得到环状化合物(9),该化合物通过烯烃醇(14)、二烯烃醇(16)和醛(17)转化为沙弗拉醛(19)。