| Literature DB >> 19736958 |
Teng Niu1, Weiming Zhang, Danfeng Huang, Changming Xu, Haifeng Wang, Yulai Hu.
Abstract
A powerful reagent, P[NCH(3)(OCH(3))](3) (3), for conversion of carboxylic acids directly to Weinreb amides was developed. In most cases the yields of the corresponding Weinreb amides were above 90% when P[NCH(3)(OCH(3))](3) was heated with aromatic and aliphatic carboxylic acids in toluene. The sterically hindered carboxylic acids can also give the corresponding Weinreb amides in excellent yields.Entities:
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Year: 2009 PMID： 19736958 DOI： 10.1021/ol901886u
Source DB: PubMed Journal: Org Lett ISSN： 1523-7052 Impact factor: 6.005