Non-Pd transition metal-catalyzed hydrostannations: Bu3SnF/PMHS as a tin hydride source
作者:Robert E. Maleczka、Banibrata Ghosh、William P. Gallagher、Aaron J. Baker、Jill A. Muchnij、Amy L. Szymanski
DOI:10.1016/j.tet.2013.02.064
日期:2013.5
and rhodium catalyzed alkyne hydrostannations using in situ generated Bu3SnH were studied. In most cases, Bu3SnF+polymethylhydrosiloxane (PMHS) performed well as the in situ source of Bu3SnH. In contrast, the combination of Bu3SnCl/KFaq/PMHS, which had witnessed earlier success in Pd-catalyzed hydrostannation reactions, proved less employable in alkyne hydrostannations mediated by these metals.
Magnesium-Catalyzed Stereoselective Hydrostannylation of Internal and Terminal Alkynes
作者:Marc Magre、Marcin Szewczyk、Magnus Rueping
DOI:10.1021/acs.orglett.0c00184
日期:2020.2.21
A regio- and stereoselective magnesium-catalyzed hydrostannylation of internal and terminalalkynes has been developed. Excellent yields and selectivities are obtained for a wide range of terminal and internal symmetrical and unsymmetrical alkynes by using this alkaline earth metal catalyst as an effective alternative to transition metal catalysts.
Stille Couplings Catalytic in Tin: The “Sn−O” Approach
作者:William P. Gallagher、Ina Terstiege、Robert E. Maleczka
DOI:10.1021/ja0035295
日期:2001.4.1
lle coupling protocol for the stereoselective generation of vinyltins and their subsequent union, employing only catalytic amounts of tin, is described. By recycling the organotinhalide Stille byproduct back to organotinhydride, a hydrostannylation/cross-coupling sequence can be carried out with catalytic amounts of tin. Such a process is most effective with Me(3)SnCl serving as the tin source. This
Platinum Catalysed Hydrostannylation of Terminal Alkynes; Highly Selective Synthesis of Vinyl Stannanes
作者:Dean D. Roberts、Mark G. McLaughlin
DOI:10.1002/adsc.202300379
日期:2023.5.23
β-(E)-vinyl stannane. The catalyst system is able to provide the corresponding vinyl stannane in selectivities which surpasses that which is typically afforded under palladium catalysis. Additionally, a telescoped hydrometallation/cross-coupling sequence has been developed, allowing for application of the vinyl stannanes without excessive manipulation or purification of the intermediate stannane.