title: Regioselective carboannulation of electron-deficient allenes with dialkyl (2-formylphenyl)malonates leading to multisubstituted naphthalenes.
abstract: An efficient base-catalysed regioselective carboannulation of allenoates (or allenylphosphonates) with dialkyl 2-(2-formylphenyl)malonates that leads to multi-substituted naphthalenes in high yields has been developed. This cascade reaction proceeds through Michael addition, cyclisation, dealkoxycarboxylation and tautomerisation. By using an allenylphosphine oxide, a species analogous to one of the intermediate species in the mechanistic pathway has been isolated.
authors.affiliation: School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India. kckssc@yahoo.com kckssc@uohyd.ac.in.
authors.forename: Nagaraju
authors.initials: N
authors.lastname: Koppanathi
authors.forename: K C Kumara
authors.initials: KC
authors.lastname: Swamy