A Convenient Synthesis of 1-Deoxy-8a-epi-Castanospermine Diastereoisomers (6R,7R,8S,8aS)-6,7,8-Trihydroxyindolizidine and (6R,7R,8R,8aS)-6,7,8-Trihydroxyindolizidine
作者:Honglu Zhang、Yi-Ke Ni、Gang Zhao、Yu Ding
DOI:10.1002/ejoc.200200412
日期:2003.5
An efficient synthesis of (6R,7R,8S,8aS)-6,7,8-trihydroxyindolizidine and (6R,7R,8R,8aS)-6,7,8-trihydroxyindolizidine is described from readily available N-BOC-L-proline, (BOC = tert-butoxycarbonyl) which involves the addition of ethyl lithiopropiolate to the aldehyde derived from N-BOC-L-proline as a key step, then cyclization to construct indolizidine skeletons and asymmetric dihydroxylation. (©
(6R,7R,8S,8aS)-6,7,8-trihydroxyindolizidine 和 (6R,7R,8R,8aS)-6,7,8-trihydroxyindolizidine 的有效合成描述自现成的 N-BOC-L-脯氨酸,(BOC = 叔丁氧基羰基),其中关键步骤是将硫代丙炔酸锂添加到衍生自 N-BOC-L-脯氨酸的醛中,然后环化以构建吲哚里西啶骨架和不对称二羟基化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)