Control of Chemo-, Regio-, and Enantioselectivity in Copper Hydride Reductions of Morita–Baylis–Hillman Adducts
作者:Roscoe T. H. Linstadt、Carl. A. Peterson、Carina I. Jette、Zarko V. Boskovic、Bruce H. Lipshutz
DOI:10.1021/acs.orglett.6b03464
日期:2017.1.20
Nonracemically ligated copper hydride can be used to effect tandem SN2′/1,2-reductions of racemic Morita–Baylis–Hillman (MBH) acetates to access enantioenriched chiral allylic alcohols with defined olefin geometry. MBH esters, including those with β-substitution, can be transformed to stereodefined enoates by taking advantage of a bulky, oligomeric, in situ generated trialkoxysiloxane leaving group
非消旋连接的氢化铜可用于串联S N 2'/ 1,2-还原外消旋的森田-贝利斯-希尔曼(MBH)乙酸酯,以得到具有定义的烯烃几何形状的对映体富集的手性烯丙基醇。MBH酯(包括具有β取代基的酯)可以利用庞大的,低聚的,原位生成的三烷氧基硅氧烷离去基团转化为立体定义的烯酸酯。最后,公开了容易到达的MBH醇衍生物向非外消旋烯丙基醇的非典型转化。