Pd-catalyzed hydrogenolysis of 4,5-epoxy-2-alkenoates: model study of the acyl side-chain of polyoxypeptin
作者:Yasuo Noguchi、Tatsuhiro Yamada、Hiromi Uchiro、Susumu Kobayashi
DOI:10.1016/s0040-4039(00)01281-8
日期:2000.9
Palladium-catalyzed hydrogenolysis of 4,5-epoxy-2-alkenoates to 5-hydroxy-2-alkenoates was examined, and it was shown that the (Z)-alkenoate with a bulky substituent at C-4 underwent hydrogenolysis with a decrease in the stereospecificity. Mechanistic considerations and steps for improvement of the stereospecificity are also presented.
考察了钯催化的4,5-环氧-2-链烯酸酯的氢解为5-羟基-2-链烯酸酯的结果,结果表明,在C-4处具有大取代基的(Z)-链烯酸酯经历了氢解反应,而C降低了。立体性。还提出了改善立体特异性的机理考虑和步骤。