Cellulose-derived chiral pyrrolidines were synthesized in excellent yields, regioselectivities, and stereoselectivities via a 1,3-dipolar cycloaddition reaction between levoglucosenone and azomethine ylides. An unprecedented isomerization event led to a new family of pyrrolidines with an unusual relative stereochemistry. Preliminary results showed that these compounds are promising organocatalysts
纤维素衍生的手性
吡咯烷类化合物通过左旋
葡糖烯酮和甲
亚胺基
亚胺之间的1,3-偶极环加成反应以优异的收率,区域选择性和立体选择性合成。前所未有的异构化事件导致了新的
吡咯烷家族具有相对不同的相对立体
化学。初步结果表明,这些化合物是用于
亚胺离子基不对称Diels-Alder反应的有前途的有机催化剂。