Highly Stereoselective Synthesis of Terminal Chloro-Substituted Propargylamines and Further Functionalization
作者:Savannah Jordan、Samuel A. Starks、Michael F. Whatley、Mark Turlington
DOI:10.1021/acs.orglett.5b02408
日期:2015.10.2
stereoselective addition of lithiated chloroacetylene, derived in situ from cis-1,2-dichloroethene and methyl lithium, to Ellman chiral N-tert-butanesulfinyl imines is reported. The reaction proceeds in high yield (up to 98%) and with excellent diastereoselectivity (up to >20:1) for a variety of aryl, heteroaromatic, alkyl, and α,β-unsaturated imine substrates. Transformations of the terminal chloro-substituted
的高度立体选择性加成锂化氯乙炔的,衍生的原位从顺式-1,2-二氯乙烯和甲基锂,对埃尔曼手性ñ -叔报道-butanesulfinyl亚胺。对于各种芳基,杂芳族,烷基和α,β-不饱和亚胺底物,该反应以高收率(最高98%)和优异的非对映选择性(最高> 20:1)进行。描述了末端氯取代的炔丙基胺产物的转化,其中锂-卤素交换产生亲核乙炔,可将其淬灭以产生末端炔烃或被碳亲电试剂拦截。