期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 50, 页码 13821-13825出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408896
关键词
aldol reactions; heterogeneous catalysis; metal-organic frameworks; organocatalysis; porous materials
资金
- NSFC [21025103, 21371119, 21431004, 21401128]
- 973 Program [2014CB932102, 2012CB8217]
- [SSTC-12XD1406300]
- [14YF1401300]
Two chiral carboxylic acid functionalized micro- and mesoporous metal-organic frameworks (MOFs) are constructed by the stepwise assembly of triple-stranded heptametallic helicates with six carboxylic acid groups. The mesoporous MOF with permanent porosity functions as a host for encapsulation of an enantiopure organic amine catalyst by combining carboxylic acids and chiral amines in situ through acid-base interactions. The organocatalyst-loaded framework is shown to be an efficient and recyclable heterogeneous catalyst for the asymmetric direct aldol reactions with significantly enhanced stereoselectivity in relative to the homogeneous organocatalyst.
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