Generation of simple enols in non-aqueous solution by fast double-bond migration of allylic alcohols with rhodium(I) and iridium(I) complexes
作者:Chong Shik Chin、Byeongno Lee、Sangtae Kim、Jongpil Chun
DOI:10.1039/dt9910000443
日期:——
5-diene), rapidly catalyse the double-bond migration of 2-ethylprop-2-en-1-ol 3 and prop-2-en-1-ol 4, respectively to generate a significant amount of the enols 2-methylbut-1-en-1-ol 5 and prop-1-en-1-ol 6 in the absence of a solvent and in CD3COCD3. Both enols 5 and 6 are quite stable and slowly undergo ketonization to the corresponding carbonyl compounds at room temperature in the absence of a solvent and
配合物[Rh(CO)(PPh 3)3 ] ClO 4 1和[Ir(cod)(PhCN)(PPh 3)] ClO 4 2(cod =环辛-1,5-二烯)快速催化双-分别迁移2-乙基丙-2-烯-1-醇3和丙-2-烯-1-醇4生成大量的烯醇2-甲基丁-1-烯-1-醇5和丙-1-en-1-ol 6在没有溶剂的情况下和在CD 3 COCD 3中。烯醇5和6它们是非常稳定的,并且在室温下在无溶剂和非质子溶剂中缓慢酮化为相应的羰基化合物。在300 MHz处的详细1 H NMR光谱数据表明,化合物3在3和1的反应中同时生成了两个异构体(Z和E),异构体的比例(主要:次要)约为1。6-9:化合物1。反应4与2还生成Ž(主要)和Ë的异构体(次要产物)6。该ž最初生成的异构体在2的存在下迅速进行异构化以生成E异构体,而Z和E异构体都相对较慢地进行酮化。报告了Me 2 C CHOD和Me 2 CDCHO的其他1 H和13