Dynamic Kinetic Resolution Approach for the Asymmetric Synthesis of Tetrahydrobenzodiazepines Using Transfer Hydrogenation by Chiral Phosphoric Acid
作者:Kosaku Horiguchi、Eri Yamamoto、Kodai Saito、Masahiro Yamanaka、Takahiko Akiyama
DOI:10.1002/chem.201601611
日期:2016.6.6
Asymmetric synthesis of tetrahydrobenzodiazepines was achieved by transfer hydrogenation of dihydrobenzodiazepines with benzothiazoline having a hydrogen‐bonding donor substituent by means of a newly synthesized chiral phosphoric acid. This method was applicable to various racemic dihydrobenzodiazepines to give the corresponding products in good yields with excellent diastereoselectivities and enantioselectivities
四氢苯并二氮杂卓的不对称合成是通过新合成的手性磷酸与具有氢键供体取代基的苯并噻唑啉转移氢化而实现的。该方法适用于各种外消旋二氢苯并二氮杂卓,利用动态动力学拆分,以良好的非对映选择性和对映选择性,以良好的收率得到相应的产物。此外,理论研究充分阐明了在3,3'-位的大取代基对催化剂和苯并噻唑啉上的氢键供体取代基的影响。