A facile protocol has been developed for a series of 3-substituted isochromen-1-ones utilizing Suzuki coupling strategy. The reaction of 3-chloroisochromen-1 one, 1 with different boronic acids utilizing PdCl2(PPh3)(2)-Ruphos catalytic system gave diversified 3-substituted isochromen-1-ones in excellent yields. The methodology has been utilized in the synthesis of glomellin and reticulol analogues. (C) 2014 Elsevier Ltd. All rights reserved.
Kulkarni; Usgaonkar, Journal of the Indian Chemical Society, 1991, vol. 68, # 9, p. 525 - 526
作者:Kulkarni、Usgaonkar
DOI:——
日期:——
Synthesis of 3-Substituted Isocoumarins through Acyloxypalladation of o-Alkenylbenzoic Acids.
Cyclization of o-alkenylbenzoic acids in the presence of Pd catalyst and benzoquinone led to 3-substituted isocoumarins in high yield. The isocoumarins obtained were converted to isoquinolones by treatment with primary amines.