Trifluoroacetic acid: a more effective and efficient reagent for the synthesis of 3-arylmethylene-3,4-dihydro-1H-quinolin-2-ones and 3-arylmethyl-2-amino-quinolines from Baylis–Hillman derivatives via Claisen rearrangement
作者:Richa Pathak、Sudharshan Madapa、Sanjay Batra
DOI:10.1016/j.tet.2006.10.053
日期:2007.1
Trifluoroacetic acid has been discovered to be a highly effective and efficient reagent for the tandem Claisen rearrangement and cyclization reaction to yield 3-arylmethylene-3,4-dihydro-1H-quinolin-2-ones from compounds obtained from the SN2 reaction between anilines and acetyl derivatives of Baylis–Hillman adducts of acrylates in the presence of DABCO. In contrast, similar compounds obtained from
已经发现三氟乙酸是用于串联克莱森重排和环化反应以从由S N 2反应获得的化合物产生3-芳基亚甲基-3,4-二氢-1 H-喹啉-2-酮的高效和高效试剂。DABCO存在下苯胺与丙烯酸Bayis-Hillman加合物的乙酰基衍生物之间的关系。相反,在三氟乙酸处理下,从Baylis-Hillman丙烯腈加成物的乙酰基衍生物获得的类似化合物通过串联Claisen重排,环化和异构化直接提供3-芳基甲基-2-氨基-喹啉。