Synthesis of Annulated Anthracenes, Carbazoles, and Thiophenes Involving Bradsher-Type Cyclodehydration or Cyclization-Reductive-Dehydration Reactions
作者:Settu Muhamad Rafiq、Ramakrishnan Sivasakthikumaran、Jayachandran Karunakaran、Arasambattu K. Mohanakrishnan
DOI:10.1002/ejoc.201500493
日期:2015.8
A conventional BF3·OEt2-mediated Bradsher-type cyclodehydration of 2-arylmethyl benzaldehydes in CH2Cl2 at room temperature gave polycyclic aromatic and heteroaromatic compounds. Alternatively, these compounds could be synthesized in better yields from 2-arylmethylbenzoic acids by triflic-acid-mediated cyclization followed by reductive dehydration.