Regiocontrolled Construction of Furo[3,2-c]pyran-4-one Derivatives by Palladium-Catalyzed Cyclization of Propargylic Carbonates with 4-Hydroxy-2-pyrones
摘要:
The reaction of propargylic carbonates with 4-hydroxy-2-pyrones in the presence of a palladium catalyst is described. By the choice of the reaction temperature, two types of the substituted furo[3,2-c]pyran-4-one derivatives were regioselectively synthesized, respectively.
Highly diastereoselective synthesis of tetrahydrobenzofuranones by palladium-catalyzed reaction of propargylic carbonates with 2-substituted cyclohexane-1,3-diones
作者:Masahiro Yoshida、Mariko Higuchi、Kozo Shishido
DOI:10.1016/j.tetlet.2007.12.123
日期:2008.3
The reaction of propargylic carbonates with 2-substituted cyclohexane-1,3-diones in the presence of palladium catalyst is described. Substituted tetrahydrobenzofuranones having a quaternary carbon stereocenter were synthesized in a highly diastereoselective manner. (c) 2008 Elsevier Ltd. All rights reserved.