Domino Aryne Annulation via a Nucleophilic–Ene Process
摘要:
1,2-Benzdiyne equivalents possess the unique property that they can react with two arynophiles through iteratively generated 1,2- and 2,3-aryne intermediates. Upon rational modification on the second leaving group of these aryne precursors, a domino aryne annulation approach was developed through a nucleophilic-ene reaction sequence. Various benzo-fused N-heterocyclic frameworks were achievable under transition metal-free conditions with a broad substrate scope.
A method for the highly regio- and enantioselective oxidativecoupling of resorcinols has been established by using dibrominated dinuclear vanadium(V) catalyst 1c under air. When resorcinols bearing an aryl substituent were applied as substrates to the coupling, axially chiral biresorcinols were obtained as single regioisomers in high yield with up to 98% ee.
Vicinal Diamination of Arenes with Domino Aryne Precursors
作者:Lu Li、Dachuan Qiu、Jiarong Shi、Yang Li
DOI:10.1021/acs.orglett.6b01747
日期:2016.8.5
Vicinal diamination of domino aryne precursors was achieved with sulfamides. The reaction proceeds through a two-aryne pathway, accepting two N-nucleophiles at the 1,2-positions of an arene ring. Symmetrical and unsymmetrical diaminobenzenes were readily obtained.
Chandrasekharan, V.; Unnikrishnan, P.; Shah, G. D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 12, p. 1052 - 1055
作者:Chandrasekharan, V.、Unnikrishnan, P.、Shah, G. D.、Bhattacharyya, S. C.