Stereoselective synthesis of novel five-membered homoazasugars. A convenient route to all-cis tetrasubstituted pyrrolidines
作者:Elena Moreno-Clavijo、Ana T. Carmona、Antonio J. Moreno-Vargas、Inmaculada Robina
DOI:10.1016/j.tetlet.2006.10.128
日期:2007.1
We present a highly stereoselective procedure for the preparation of (2S and 2R,3S,4R,5S)-5-methyl-3,4-dihydroxy-2- ethoxycarbonylmethylpyrrolidines based on conjugate addition of ammonia to unsaturated aldonic esters derived from d-ribose followed by tandem cyclization. Derivatisation of these compounds to 2-hydroxyethyl-, benzymidazolylmethyl-, biphenyl-1-aminoethyl and naphthalene-l-aminoethyl-pyrrolidines
我们提出了一个高度立体选择性的程序,用于制备(2 S和2 R,3 S,4 R,5 S)-5-甲基-3,4-二羟基-2-乙氧基羰基甲基吡咯烷酮衍生自d-核糖,然后串联环化。还提出了将这些化合物衍生为2-羟乙基-,苯并咪唑基甲基-,联苯-1-氨基乙基和萘-1-氨基乙基-吡咯烷。