Photochemical synthesis of benzoxazolo[3,2-b]isoquinolin-11-one and isoquinolino[3,2-b][1,3]benzoxazin-11-one under basic conditions
作者:A. Senthilvelan、D. Thirumalai、V.T. Ramakrishnan
DOI:10.1016/j.tet.2005.02.068
日期:2005.4
Irradiation of N-phenyl substituted isoquinolines in acetonitrile containing 1 M NaOH in a multilamp reactor (MLR) furnished benzoxazolo[3,2-b]isoquinolin-11-ones. In contrast, irradiation of the N-benzyl substituted isoquinoline derivative under the same conditions afforded the hydrolysed N-benzylbenzamide derivative. The isoquinolinobenzoxazine was obtained by irradiating the N-benzyl substituted isoquinoline derivative at higher basic conditions. The required isoquinolines were synthesized under solvent-free, solid supported microwave conditions. (c) 2005 Elsevier Ltd. All rights reserved.