title: A novel and facile synthesis of 3-(2-benzofuroyl)- and 3,6-bis(2-benzofuroyl)carbazole derivatives.
abstract: A facile synthesis of hitherto unreported 3-(2-benzofuroyl)carbazoles 3a-k, 3,6-bis(2-benzofuroyl)carbazoles 5a-k, and naphtho[2,1-b]furoylcarbazoles 3l and 5l is described. The synthesis mainly relies on the ultrasound-assisted Rap-Stoermer reaction of 3-chloroacetyl- (1) or 3,6-dichloroacetyl-9-ethyl-9H-carbazole (4) with various salicylaldehydes 2a-k as well as 2-hydroxy-1-naphthaldehyde (2l) in CH(3)CN with the presence of PEG-400 as catalyst. The procedure offers easy access to benzofuroylcarbazoles in short reaction times and the products are obtained in moderate to good yields.
authors.affiliation: Institute of Superfine Chemicals, Bohai University, Jinzhou 121000, China.
authors.forename: Wentao
authors.initials: W
authors.lastname: Gao
authors.forename: Meiru
authors.initials: M
authors.lastname: Zheng
authors.forename: Yang
authors.initials: Y
authors.lastname: Li