The 6-hydroxynona-2,7-dienylstananne 10 reacts with aldehydes after transmetallation with tin(IV) bromide with syn-selective 1,7-induction (1,7-syn : 1,7-anti = ca. 90 : 10). Ireland-Claisen rearrangements of the acetates 28a,b prepared from the syn-benzaldehyde product 14, gave methyl (3R,11R)-3-methyl-11-(arylmethoxy)-11-phenylundeca-4,8-dienoates 30a,b stereoselectively.
6-羟基壬基-2,7-二烯基
锡烷10与
溴化锡(IV)发生
金属转移后,通过顺式选择性1,7-诱导(1,7- syn:1,7- anti =大约90:10)与醛反应。 。由顺-
苯甲醛产物14制备的
乙酸酯28a,b的爱尔兰-克莱森重排,得到甲基(3 R,11 R)-3-甲基-11-(芳甲氧基)-11-苯基双烯基-4,8-二烯酸酯30a b立体选择。