作者:Fen-Er Chen、Yao-Dong Huang、Han Fu、Yu Cheng、Dao-Ming Zhang、Yong-Ye Li、Zuo-Zong Peng
DOI:10.1055/s-2000-8716
日期:——
An efficient and enantioselective synthesis of d-biotin 1 starting from cis 1,3-dibenzyl-2-imidazo-lidone-4,5-dicarboxylic acid (6) is described. The key steps are the enantioselective reduction of meso-1,2-dicarboxylic thioanhydride 8 to prepare the (3aS,6aR)-thiolactone 9 and the introduction of the C6 side chain at C-2 in 9 via a modified Grignard reaction. This novel synthesis proceeded in six steps to afford 1 with 21% overall yield.
报道了一种从顺式1,3-二苄基-2-咪唑啉-4,5-二羧酸(6)出发的高效、高对映选择性的d-生物素1合成方法。关键步骤包括将对映选择性还原的介观-1,2-二羧酸硫代酐8制备为(3aS,6aR)-硫内酯9,以及通过改良的格氏反应在9的C-2位引入C6侧链。这种新颖的合成方法经过六步反应,以21%的总产率得到1。