Direct Synthesis of Chiral 1,2,3,4-Tetrahydropyrrolo[1,2-<i>a</i>]pyrazines via a Catalytic Asymmetric Intramolecular Aza-Friedel–Crafts Reaction
作者:Yuwei He、Maohui Lin、Zhongmin Li、Xinting Liang、Guilong Li、Jon C. Antilla
DOI:10.1021/ol2018328
日期:2011.9.2
intramolecular aza-Friedel–Crafts reaction of N-aminoethylpyrroles with aldehydes catalyzed by a chiral phosphoric acid represents the first efficient method for the preparation of medicinally interesting chiral 1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazines with high yields and high enantioselectivities. This strategy has been shown to be quite general toward various aldehydes and pyrrole derivatives.
N-氨基乙基吡咯与手性磷酸催化的醛类的直接不对称分子内氮杂-Friedel-Crafts反应代表了制备具有医学意义的手性1,2,3,4-四氢吡咯并[1,2- a ]的第一种有效方法具有高收率和高对映选择性的吡嗪。对于各种醛和吡咯衍生物,该策略已被证明是非常普遍的。