Practical Asymmetric Synthesis of a Selective Endothelin A Receptor (ETA) Antagonist
作者:Zhiguo J. Song、Matthew Zhao、Lisa Frey、Jing Li、Lushi Tan、Cheng Y. Chen、David M. Tschaen、Richard Tillyer、Edward J. J. Grabowski、Ralph Volante、Paul J. Reider、Yoshiaki Kato、Shigemitsu Okada、Takayuki Nemoto、Hiroki Sato、Atsushi Akao、Toshiaki Mase
DOI:10.1021/ol016601s
日期:2001.10.1
[structure: see text]. A practical, chromotography-free asymmetric synthesis was developed for the large scale preparation of an endothelin receptor antagonist 2. This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium followed by stereospecific addition of the Grignard reagent of the top aryl bromide
[结构:见文字]。开发了一种实用的无色谱不对称合成方法,用于大规模制备内皮素受体拮抗剂2。该合成方法包括制备6-溴-2,3-二氢苯并呋喃的新有效方法,即芳基锂的立体选择性共轭加成。其次是立体定向添加顶部芳基溴的格氏试剂,以及氨基磷酸介导的立体定向分子内烯醇酸酯烷基化,这导致形成带有三个连续不对称中心的五元环。