Synthesis of <i>trans</i>-2-(Trifluoromethyl)cyclopropanes via Suzuki Reactions with an <i>N</i>-Methyliminodiacetic Acid Boronate
作者:Matthew A. J. Duncton、Rajinder Singh
DOI:10.1021/ol401636d
日期:2013.9.6
trans-2-(Trifluoromethyl)cyclopropylboronic acid N-methyliminodiacetic acid (MIDA) ester 5 was synthesized as a pure diastereomer from vinylboronic acid MIDA ester and (trifluoromethyl)diazomethane in a single step. An X-ray study confirmed the trans-stereochemistry around the cyclopropyl ring. Use of 5 in Suzuki reactions, with a variety of aryl or heteroaryl coupling partners, provided trans-2-(
反式-2-(三氟甲基)环丙基硼酸Ñ -methyliminodiacetic乙酸(MIDA)酯5的合成从乙烯基硼酸MIDA酯和(三氟甲基)重氮甲烷在单个步骤中的纯非对映体。X射线研究证实了环丙基环周围的反式立体化学。在Suzuki反应中使用5和各种芳基或杂芳基偶合伙伴,可提供中等至极好的收率(17-90%)的反式-2-(三氟甲基)环丙基产品。