作者: Noriyuki Hara , Shuichi Nakamura , Norio Shibata , Takeshi Toru
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摘要: N-(2-Thiophenesulfonyl)prolinamide could be easily introduced into Montmorillonite by a simple ion-exchange reaction. The asymmetric aldol reactions between various isatins with acetone or acetaldehyde using heterogeneous Montmorillonite-entrapped organocatalyst afforded products high enantioselectivity. catalyst was readily reusable without significant loss of catalytic activity