Proline-Catalysed Amination Reactions in Cyclic Carbonate Solvents

Abstract

Propylene carbonate is shown to be an environmentally friendly and sustainable replacement for dichloromethane and acetonitrile in proline-catalysed a-hydrazinations of aldehydes and ketones. Enantioselectivities comparable to those obtained in conventional solvents or ionic liquids can be obtained, even when using a lower catalyst loading.

Keywords

• proline
• amination
• cyclic-carbonate