作者:Susumi Hatakeyama、Hiroko Fukuyama、Yasuko Mukugi、Hiroshi Irie
DOI:10.1016/0040-4039(96)00758-7
日期:1996.6
The first total synthesis of (+)-conagenin, a novel immunomodulator produced by Streptomyces roseosporus, has been achieved in highly stereo- and enantioselective manner. The carboxylic acid moiety was synthesized starting with asymmetric aldol reaction of propiophenone with acetaldehyde followed by in situ syn-selective NaBH4 reduction. The amino acid moiety was synthesized based upon Et2AlCl catalyzed
玫瑰链霉菌生产的新型免疫调节剂(+)-conagenin的第一个全合成已以高度立体和对映选择性的方式实现。从苯乙酮与乙醛的不对称醛醇缩合反应开始,然后原位顺式选择性NaBH 4还原,开始合成羧酸部分。基于由(S)-乙基缩水甘油制备的环氧三氯乙亚氨酸酯的Et 2 AlCl催化的环化,合成氨基酸部分。两个部分的缩合和碱性水解均导致(+)-刀豆蛋白。