22,-Dimethyl-4-phenyloxazoline and 2,2-dimethyl-4,5-diphenylimidazolidine as new chiral auxiliaries. Applications to asymmetric nitrile oxide cycloadditions
作者:Shuji Kanemasa、Kenjiro Onimura、Eiji Wada、Junji Tanaka
DOI:10.1016/s0957-4166(00)80018-x
日期:1991.1
Asymmetric dipolar cycloadditions of a nitrile oxide to the acrylamide derivatives of two new chiral auxiliaries, (R)-2,2-dimethyl-4-phenyloxazolidines and (S,S)-2,2-dimethyl-4,5-diphenylimidazolidine, show satisfactorily high diastereoselectivities (up to 91%).
显示两种新手性助剂(R)-2,2-二甲基-4-苯基恶唑烷和(S,S)-2,2-二甲基-4,5-二苯基咪唑烷的丙烯酰胺衍生物的腈氧化物的不对称偶极环加成反应令人满意的高非对映选择性(高达91%)。