• 文献标题:   Green Regio- and Enantioselective Aminolysis Catalyzed by Graphite and Graphene Oxide under Solvent-Free Conditions
  • 文献类型:   Article
  • 作  者:   ACOCELLA MR, D URSO L, MAGGIO M, GUERRA G
  • 作者关键词:   aminolysi, enantioselectivity, graphene oxide, graphite, green chemistry
  • 出版物名称:   CHEMCATCHEM
  • ISSN:   1867-3880 EI 1867-3899
  • 通讯作者地址:   Univ Salerno
  • 被引频次:   10
  • DOI:   10.1002/cctc.201600241
  • 出版年:   2016

▎ 摘  要

The ring-opening reactions of epoxides with amines were efficiently and regioselectively catalyzed by high-surface-area graphite and graphene oxide under metal-free and solvent-free conditions. For epoxides without aryl groups, catalytic activity was observed only for graphene oxide, and hence, the activity must have been due to its acidic groups. For styrene oxide, instead, graphite and graphene oxide exhibited rather similar catalytic activities, and hence, the activity was mainly due to activation of the electrophilic epoxide by pi-stacking interactions with the graphitic pi system. The described aminolysis procedure is green and cheap because the catalyst can be recovered and recycled without loss of efficiency. Moreover, these heterogeneous catalysts exert high stereoselective control in the presence of nonracemic epoxides and provide chiral beta-amino alcohols with enantiomeric excess values up to 99 %.