Rhodium catalyzed hydroacylation of ethylene with 4-pentenals. reactions of 4-hexenal-1-d
作者:Krishnakant P. Vora、Charles F. Lochow、Roy G. Miller
DOI:10.1016/s0022-328x(00)94430-9
日期:1980.6
A catalyst derived from 2,4-pentanedionatobis(ethylene)rhodium(I), I, promoted the addition of 4-pentenal to ethylene. The reaction was accompanied by the formation of double bond migration products derived from the 4-pentenal reactant and from the 6-hepten-3-one primary product. Compound I accomplished the addition of 4-hexenal to ethylene to afford high yields of 6-octen-3-one. The fate of the aldehyde
衍生自2,4-戊二酮基双(乙烯)铑(I)的催化剂I促进了将4-戊烯醛添加至乙烯。该反应伴随有衍生自4-戊烯醛反应物和6-庚-3-一初级产物的双键迁移产物。化合物I完成了将4-己烯醛加到乙烯中,得到高产率的6-辛烯-3-酮。在这一转变醛氢的命运在采用4-己烯醛-1-实验被确定d作为反应物。4-己烯醛-1-的治疗d在CHCl与I 3和CDCL 3,得到6-辛烯-3-酮具有> 50%的d ö分子,而回收的未用4-己烯醛的同位素组成保持> 96%d 1。当将乙烯引入反应混合物中时,提供了同位素组成> 66%d o的6-Octen-3-one产物。氘的在-6-辛烯-3-酮的位置,从治疗衍生4-己烯醛-1- d与I在不存在添加的C 2 ħ 4,测定在C-1和C-2和将要分配通过1 H和2 H NMR光谱分析,确定CC键上的碳原子数。回收了未消耗的乙烯,发现其中含有大量的氘。讨论了这些结果的机理含义。