An efficient nickel-catalyzed regioselective hydroarylation of 1,3-dienes with arylhalides and using silanes as hydride source is developed, affording functionalized arenes in good to excellent yields under mild conditions. The protocol shows a high tolerance to various functional groups on both the dienes and aryl coupling partners. Mechanism studies indicate that π-allyl nickel species is likely
Direct coupling of alcohols with alkenylsilanes catalyzed by indium trichloride or bismuth tribromide
作者:Yoshihiro Nishimoto、Masayuki Kajioka、Takahiro Saito、Makoto Yasuda、Akio Baba
DOI:10.1039/b816072d
日期:——
Indium halides or bismuth halides catalyzed the coupling of various alcohols with alkenylsilanes to give the corresponding alkenes stereospecifically without any other activators.
Nickel-catalyzed cross-electrophile coupling of aryl chlorides with allylic alcohols
作者:Hang Yu、Zhong-Xia Wang
DOI:10.1039/d1ob01874d
日期:——
Nickel-catalyzed cross-electrophile coupling of aryl chlorides with allylicalcohols proceeds readily under mild conditions in the presence of zinc powder and MgCl2 to produce allylarenes in 25–92% yields. The reaction shows high regioselectivity and E/Z-selectivity, giving linear allylation products with an E configurated double bond when 1- or 3-arylallyl alcohols were used as the substrates. Functional groups including
Rhodium-Catalyzed Allylic Substitution Reactions with Indium(III) Organometallics
作者:Ricardo Riveiros、Rubén Tato、José Pérez Sestelo、Luis A. Sarandeses
DOI:10.1002/ejoc.201200104
日期:2012.5
novel rhodium-catalyzed allylic substitution reaction using indium organometallics is reported. Aryl- and heteroarylindium reagents reacted in THF at 80 °C with primary and secondary allyl halides and their derivatives under rhodium(I) catalysis to afford the α-substituted products in good yields and with high regio- and stereoselectivity. The reaction takes place with substoichiometric amounts of
We herein report a transition-metal-free cross-coupling between secondaryalkylhalides/mesylates and aryl/alkenylboronic acid, providing expedited access to a series of nonchiral/chiral coupling products in moderate to good yields. Stereospecific SN2-type coupling is developed for the first time with alkenylboronic acids as pure nucleophiles, offering an attractive alternative to the stereospecific