期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 43, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202207647
关键词
Boron; Density-Functional Calculations; Hydroboration; Reduction; Selectivity
资金
- DFG [491117731]
- RWTH Aachen University
- MICINN [IJC2020-045125-I]
- Projekt DEAL
- FCI
Although challenges still exist, we have developed a simple and mild protocol that selectively reduces starting materials containing both more nucleophilic and more electrophilic groups at room temperature. This protocol is able to preserve the integrity of other functional groups.
Although considerable advances have been made in developing chemoselective transformations of ubiquitous carboxylic acid groups, many challenges still exist. For instance, their selective reduction is problematic if both more nucleophilic and more electrophilic groups are present in the starting material. Here, we address this problem with a simple and mild protocol using bench-stable reagents at ambient temperatures. This platform is able to tolerate a diverse range of functionality, leaving ketones, esters, nitro-groups, ole-fins, nitriles and amides untouched. A combination of experimental and computational mechanistic experiments demonstrate that this reaction proceeds via hidden borane catalysis with small quantities of in situ generated BH3 playing a key role in the exquisite selectivity that is observed.
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