High γ-selectivity in the coupling of penta-2,4-dienyl- and pent-2-en-4-ynylindium reagents with aldehydes
作者:Tsunehisa Hirashita、Shin'ichirou Inoue、Hatsuo Yamamura、Masao Kawai、Shuki Araki
DOI:10.1016/s0022-328x(97)00513-5
日期:1997.12
A variety of penta-2,4-dienyl- and pent-2-en-4-ynylindium reagents have been prepared in situ from the reaction of the corresponding allylic bromides with indium metal, and their reactions with carbonyl compounds have been examined. The reaction with aldehydes gives the corresponding homoallyl alcohols in high yields. The coupling occurs regioselectively at the γ-position of these indium reagents. No
从相应的烯丙基溴化物与铟金属的反应中原位制备了各种五-2,4-二烯基-和戊-2-烯-4-吡啶鎓试剂,并研究了它们与羰基化合物的反应。与醛的反应以高收率得到相应的均烯丙基醇。偶联选择性地在这些铟试剂的γ-位发生。没有形成α-和ϵ-耦合产物。