An Efficient Enantioselective Synthesis of the D1 Agonist (5a<i>R</i>,11b<i>S</i>)-4,5,5a,6,7,11b-Hexahydro-2-propyl-3-thia- 5-azacyclopenta[<i>c</i>]phenanthrene-9,10-diol (A-86929)
作者:Paul P. Ehrlich、Jeffrey W. Ralston、Michael R. Michaelides
DOI:10.1021/jo970066l
日期:1997.5.1
(5aR,11bS)-4,5,5a,6,7,11b-hexahydro-2-propyl-3-thia-5-azacyclopenta[c]phenanthrene-9,10-diol (A-86929, 1), a potent selective dopamine D1 agonist, was synthesized enantioselectively from D-aspartic acid. Key features of the 10-step synthesis are the following: (1) there is no chromatography required; (2) formation of 15 occurs in >99% ee; (3) the electrophilic cyclization to provide the desired trans stereochemisty in 18 is achieved with no loss of enantiomeric integrity.
一种活性较强的多巴胺D1受体激动剂——(5aR,11bS)-4,5,5a,6,7,11b-六氢-2-丙基-3-硫杂-5-氮杂环戊[c]菲喃芬[9,10-二醇](A-86929, 1),已通过D-天冬氨酸的高对映选择性方法成功合成。该10步合成工艺的关键特点如下:(1)无需色谱分离;(2)化合物15的形成具有>99%的对映体纯度;(3)电环化反应以保持目标式18的反式立体化学,且在此过程中完全保留对映体完整性。