Several new chiral allylstannanes were prepared and reacted with aldehydes. Excellent diastereofacial selectivity was observed for the reactions of allylstannane 1 with aldehydes in the presence of BF3·Et2O. This is in contrast to the results from other allylstannanes which do not bear a β-methyl group. These observations were rationalized based on a combination of steric and electronic effects.
制备了几种新的手性烯丙基
锡烷,并与醛反应。在存在BF 3 ·Et 2 O的情况下,烯丙基
锡烷1与醛的反应具有极好的非对映选择性,这与其他不带有β-甲基基团的烯丙基
锡的结果相反。这些观察是基于空间和电子效应的组合而合理化的。