Nickel-Catalyzed Double Bond Transposition of Alkenyl Boronates for <i>in Situ</i> <i>syn</i>-Selective Allylboration Reactions
作者:Felicia Weber、Monika Ballmann、Corinna Kohlmeyer、Gerhard Hilt
DOI:10.1021/acs.orglett.5b03585
日期:2016.2.5
zinc powder, ZnI2, and Ph2PH. The in situ generated Z-crotyl pinacol boronic esters were reacted with various aldehydes to form syn-homoallylic alcohols in high diastereoselectivities. The present nickel-catalyzed reaction is complementary to the iridium-catalyzed transposition reported by Murakami leading to the corresponding anti-homoallylic alcohols. Also, the multiple transposition of pentenyl
均烯丙基频哪醇硼酸酯的移位是通过高反应性镍催化剂体系实现的,该体系包括NiCl 2(dppp),锌粉,ZnI 2和Ph 2 PH。使原位生成的Z-巴豆基频哪醇硼酸酯与各种醛反应,以高非对映选择性形成顺式-均烯丙基醇。本镍催化的反应与村上报道的铱催化的转位是互补的,导致相应的抗同型烯丙基醇。同样,实现了戊烯基频哪醇硼酸酯的多重转位。