A Practical and Efficient Synthesis of (3<i>R</i>,4<i>S</i>)-1-Benzyl-4-phenylpyrrolidine-3-carboxylic acid via an Aziridinium Ion Intermediate
作者:Atsushi Ohigashi、Takashi Kikuchi、Shunsuke Goto
DOI:10.1021/op900230r
日期:2010.1.15
utilizing a stereospecific and regioselective chlorination of in situ generated aziridiniumion, followed by a nitrile anion cyclization. Starting from commercially available (R)-styrene oxide and 3-(benzylamino)propionitrile, the four-step synthesis features a through process without purification of intermediates until isolation of crystalline 1. The robust, chromatography-free and reproducible synthesis
Thiourea-Mediated Stereospecific Deoxygenation of Cyanoepoxides to Access Highly Diastereopure Alkenyl Nitriles
作者:Yujie Zhang、Shukui Shi、Zhanhui Yang
DOI:10.1021/acs.joc.3c02869
日期:2024.2.16
A practical and efficient protocol for synthesis of >99% diastereopure Z- and E-alkenyl nitriles is developed, through tetramethylthiourea-mediated stereospecificdeoxygenation of respective cis- and trans-cyanoepoxides in ethanol. The desired products are obtained in excellent yields.