Optically active isoxazolidines and 1,3-amino alcohols by asymmetric selenocyclization reactions of O-allyl oximes
作者:Marcello Tiecco、Lorenzo Testaferri、Francesca Marini、Silvia Sternativo、Claudio Santi、Luana Bagnoli、Andrea Temperini
DOI:10.1016/s0957-4166(01)00543-2
日期:2001.11
The selenyl triflate generated from the reaction of di-2-[(1S)-1-(methylthio)ethyl]phenyl diselenide with silver triflate reacts with various substituted O-allyl oximes to promote ring closure, which affords optically active isoxazolidines in high yields and with good diastereoselectivity (up to 93:7). Enantiomerically enriched 1,3-amino alcohols can be easily obtained by NO bond cleavage of these
由二-2-[((1S)-1-(甲硫基)乙基]苯基二硒化物与三氟甲磺酸银反应生成的三氟甲磺酸硒酯与各种取代的O-烯丙基肟反应以促进闭环,从而在高浓度下提供光学活性的异恶唑烷收率高,非对映选择性好(高达93:7)。对映体富集的1,3-氨基醇可以很容易地获得Ñ ö这些杂环,其容易通过用在含水乙酸中的锌进行的键裂解。