An enantioselective route to pyrrolidines: removal of the chiral template from homochiral pyrroloimidazoles
作者:Raymond C.F. Jones、Kevin J. Howard、John S. Snaith、Alexander J. Blake、Wang-Shei Li、Peter J. Steel
DOI:10.1016/j.tet.2011.08.099
日期:2011.11
Two-step reductive removal of the chiral template from optically active pyrroloimidazoles, available from 1,3-dipolar cycloaddition of homochiral 4,5-dihydroimidazolium ylides, gives optically active substituted pyrrolidines. Selective manipulation of the substituents affords, e.g., naturally occurring and other optically active proline derivatives, and optically active pyrrolizidines and indolizidines
从旋光的吡咯并咪唑类化合物中进行两步还原性去除,可以从均手性的4,5-二氢咪唑鎓内酯的1,3-偶极环加成中获得旋光性的取代的吡咯烷。取代基的选择性操纵提供了例如天然存在的和其他光学活性的脯氨酸衍生物,以及光学活性的吡咯烷核苷和吲哚并核苷。