作者:Jason R. Zbieg、Takeo Fukuzumi、Michael J. Krische
DOI:10.1002/adsc.201000599
日期:2010.10.4
cyclometallated iridium catalyzed derived from allyl acetate, 4-methoxy-3-nitrobenzoic acid and BIPHEP (2,2'-bis(diphenylphosphino)biphenyl) results in hydrogen transfer to generate aldehyde-allyliridium pairs, which engage in C-C coupling to form products of carbonyl crotylation. Under related conditions using 1,4-butanediol as hydrogen donor, butadiene reductively couples to aldehydes 2e-2g and 2i to furnish
在乙酸烯丙酯,4-甲氧基-3-硝基苯甲酸和BIPHEP(2,2'-双(二苯基膦基)联苯)衍生的环金属化铱催化下,将醇1a-1i与丁二烯接触会导致氢转移生成醛-烯丙基铱对,其参与CC偶联以形成羰基羰基化的产物。在使用1,4-丁二醇作为氢供体的相关条件下,丁二烯还原性偶联至醛2e-2g和2i,以提供羰基羰基化产物3e-3g和3i。因此,丁二烯介导的羰基丁酰化以与醇或醛氧化水平相同的便利性发生,具有完全的支链区域选择性水平。