Competing OH insertion and β-elimination in rhodium carbenoid reactions; synthesis of 2-alkoxy-3-arylpropanoates
作者:Geoffrey G. Cox、David Haigh、Richard M. Hindley、David J. Miller、Christopher J. Moody
DOI:10.1016/s0040-4039(00)76851-1
日期:1994.5
Rhodium(II) carboxylate catalysed decomposition of diazo esters 3 and 4 in the presence of alcohols or water results in formation of 2-alkoxy- or 2-hydroxy-3-arylpropanoates respectively by OH insertion in competition with cinnamates by elimination; the ratio of insertion to elimination is dramatically affected by the carboxylate ligand on rhodium. Use of methanol-d as the alcohol confirms that the
在醇或水存在下,羧酸铑(II)催化重氮酯3和4分解,分别通过OH插入形成2-烷氧基-或2-羟基-3-芳基丙酸酯,并与肉桂酸酯竞争消除。铑上的羧酸盐配体极大地影响了插入与消除的比率。甲醇-d作为醇的使用证实了通过从初始烷氧基酯产物中消除而不会产生烯烃。