Ethyl 2-Chlorooxazole-4-carboxylate: A Versatile Intermediate for the Synthesis of Substituted Oxazoles
作者:Kevin J. Hodgetts、Mark T. Kershaw
DOI:10.1021/ol0262800
日期:2002.8.1
[reaction: see text] By using a sequence of regiocontrolled halogenation and palladium-catalyzed coupling reactions, the synthesis of variously substituted oxazoles from ethyl 2-chlorooxazole-4-carboxylate (2) was accomplished. The methodology was applied to the synthesis of a series of 2,4-disubstituted, 2,5-disubstituted, and 2,4,5-trisubstituted oxazoles.
[反应:见正文]通过一系列区域控制的卤化反应和钯催化的偶联反应,由2-氯恶唑-4-羧酸乙酯(2)合成了各种取代的恶唑。该方法学应用于一系列2,4-二取代,2,5-二取代和2,4,5-三取代的恶唑的合成。