Enantio- and diastereoselective double Mannich reaction of malononitrile with <i>N</i>-Boc imines using quinine-derived bifunctional organoiodine catalyst
作者:Satoru Kuwano、Eri Ogino、Takayoshi Arai
DOI:10.1039/d1ob00796c
日期:——
asymmetric double Mannich reaction of malononitrile with N-Boc and N-Cbz imines to afford 1,3-diamines in excellent yields with high enantio- and diastereoselectivities. With 2.2 equiv. of a single imine electrophile, symmetrical 1,3-diamines were obtained, whereas, with two different imine partners, unsymmetrically substituted 1,3-diamine was obtained. The monohydration of the double Mannich product was
使用具有卤素键供体官能团的手性奎宁衍生有机碱催化剂催化丙二腈与N -Boc和N -Cbz 亚胺的不对称双曼尼希反应,以优异的收率和高对映选择性和非对映选择性得到 1,3-二胺。2.2当量。在单个亚胺亲电体中,获得了对称的 1,3-二胺,而对于两种不同的亚胺伙伴,获得了不对称取代的 1,3-二胺。还实现了双曼尼希产物的单水合。