Crystallisation induced asymmetric transformation (CIAT) in the synthesis of furoylalanines and furylcarbinols
摘要:
A new synthesis of enantiomerically highly enriched N-substituted furoylalanines has been developed. This process involves the combination of crystallisation induced asymmetric transformation (CIAT) and a conjugate addition of N-nucleophiles to furoylacrylic acids. Further transformations to furoylalanines and substituted furylcarbinols are also described. (c) 2006 Elsevier Ltd. All rights reserved.
Crystallisation induced asymmetric transformation (CIAT) in the synthesis of furoylalanines and furylcarbinols
摘要:
A new synthesis of enantiomerically highly enriched N-substituted furoylalanines has been developed. This process involves the combination of crystallisation induced asymmetric transformation (CIAT) and a conjugate addition of N-nucleophiles to furoylacrylic acids. Further transformations to furoylalanines and substituted furylcarbinols are also described. (c) 2006 Elsevier Ltd. All rights reserved.
Clay montmorillonite K10 catalyzed aldol-type reaction of aldehydes with silyl enol ethers in water
作者:Teck-Peng Loh、Xu-Ran Li
DOI:10.1016/s0040-4020(99)00594-3
日期:1999.8
for the cross aldol reaction of silyl enol ethers and ketene silyl acetal with various aldehydes using montmorillonite K10 is described. Cheap and commercially available montmorillonite K10 can be used without the need of an ion exchange process under solvent-free conditions or in water. Hydrate of aldehydes such as glyoxylic acid can be used directly. Thermal treatment of K10 increased the catalytic