A Powerful Reagent for Synthesis of Weinreb Amides Directly from Carboxylic Acids
摘要:
A powerful reagent, P[NCH3(OCH3)](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[NCH3(OCH3)13 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.
A Powerful Reagent for Synthesis of Weinreb Amides Directly from Carboxylic Acids
摘要:
A powerful reagent, P[NCH3(OCH3)](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[NCH3(OCH3)13 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.
Synthesis Studies on the Lomaiviticin A Aglycone Core: Development of a Divergent, Two-Directional Strategy
作者:Ken S. Feldman、Brandon R. Selfridge
DOI:10.1021/jo4005074
日期:2013.5.3
a two-directional, divergent approach featuring (1) a double Ireland Claisen rearrangement to establish key core bonds with correct relative stereochemistry and (2) a double olefinmetathesis reaction to deliver both cyclohexene rings of the target.
A Powerful Reagent for Synthesis of Weinreb Amides Directly from Carboxylic Acids
作者:Teng Niu、Weiming Zhang、Danfeng Huang、Changming Xu、Haifeng Wang、Yulai Hu
DOI:10.1021/ol901886u
日期:2009.10.1
A powerful reagent, P[NCH3(OCH3)](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[NCH3(OCH3)13 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.