Phosphine-mediated synthesis of trifluoromethyl substituted pyrroles using TFAA as the CF3 source
摘要:
A phosphine-mediated synthesis of trifluoromethyl substituted pyrrole derivatives was achieved. The method described here is very fast, operationally simple, and easily amenable to scale-up, and commercially available trifluoroacetic anhydride (TFAA) is used as the only trifluoromethyl source. A wide range of products were obtained with good yields under mild condition using this method. 0(C)2014 Elsevier Ltd. All rights reserved.
Reactions of Arylaldehydes and N-Sulfonated Imines with Dimethyl Acetylenedicarboxylate Catalyzed by Nitrogen and Phosphine Lewis Bases
作者:Chao-Qun Li、Min Shi
DOI:10.1021/ol0354324
日期:2003.11.1
[reaction: see text] In the reaction of arylaldehydes or N-sulfonated imines (0.5 mmol) with dimethyl acetylenedicarboxylate (DMAD) (0.6 mmol) catalyzed by pyridine or DMAP (20 mol %), we found that (E)-2-aryl-but-2-enedioic acid dimethyl ester 1 or (E)-2-[aryl-(toluene-4-sulfonylimino)methyl]-but-2-enedioic acid dimethyl ester 2 was formed in good yields at 60 degrees C in THF. A plausible mechanism
Phosphine-mediated synthesis of trifluoromethyl substituted pyrroles using TFAA as the CF3 source
作者:Dan-Dan Tang、Yao Wang、Jun-Ru Wang、Peng-Fei Xu
DOI:10.1016/j.tetlet.2014.05.127
日期:2014.7
A phosphine-mediated synthesis of trifluoromethyl substituted pyrrole derivatives was achieved. The method described here is very fast, operationally simple, and easily amenable to scale-up, and commercially available trifluoroacetic anhydride (TFAA) is used as the only trifluoromethyl source. A wide range of products were obtained with good yields under mild condition using this method. 0(C)2014 Elsevier Ltd. All rights reserved.