Iridium-Catalyzed Dehydrogenative Decarbonylation of Primary Alcohols with the Liberation of Syngas
作者:Esben P. K. Olsen、Robert Madsen
DOI:10.1002/chem.201202631
日期:2012.12.7
A new iridium‐catalyzed reaction in which molecular hydrogen and carbon monoxide are cleaved from primary alcohols in the absence of any stoichiometric additives has been developed. The dehydrogenative decarbonylation was achieved with a catalyst generated in situ from [Ir(coe)2Cl]2 (coe=cyclooctene) and racemic 2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl (rac‐BINAP) in a mesitylene solution saturated
一种新的铱-其中分子氢和一氧化碳从伯醇在不存在任何化学计量的添加剂的裂解催化反应已经研制成功。用[Ir(coe)2 Cl] 2(coe =环辛烯)和外消旋2,2'-双(二苯基膦基)-1,1'-联萘(rac)原位生成的催化剂完成脱氢脱羰作用。‐BINAP)在用水饱和的均三甲苯溶液中。还添加催化量的氯化锂以改善催化剂的周转率。该反应已应用于多种伯醇,并产生了产率高至优异的产物。醚,酯,酰亚胺和卤代芳基在反应条件下是稳定的,而烯烃是部分饱和的。据信,该反应是通过相同的铱(I)-BINAP物种催化的两个连续的有机金属转化而进行的。首先,将伯醇脱氢成相应的醛,然后将其脱羰基成具有少一个碳原子的产物。