Direct Synthesis of Alkynylstannanes: ZnBr<sub>2</sub>Catalyst for the Reaction of Tributyltin Methoxide and Terminal Alkynes
作者:Kensuke Kiyokawa、Nodoka Tachikake、Makoto Yasuda、Akio Baba
DOI:10.1002/anie.201104208
日期:2011.10.24
Metal hopping: Various alkynylstannanes were synthesized by the directreaction of Bu3SnOMe with terminalalkynes at room temperature in the presence of a ZnBr2 catalyst. Rather than acting as a Lewis acid, ZnBr2 was transmetalated with Bu3SnOMe to give Zn(OMe)2, which is key to the catalytic reaction.
Catalytic Dehydrogenative Stannylation of C(sp)–H Bonds Involving Cooperative Sn–H Bond Activation of Hydrostannanes
作者:Francis Forster、Victoria M. Rendón López、Martin Oestreich
DOI:10.1021/jacs.7b13088
日期:2018.1.31
a stannylium-ion-like tin electrophile by heterolytic cleavage of the Sn-H bond in hydrostannanes at the Ru-S bond of Ohki-Tatsumi complexes is reported. Reacting these activated hydrostannanes with terminal acetylenes does not lead to hydrostannylation of the C-C triple bond but to dehydrogenative stannylation of the alkyne terminus. The scope of this rare direct C(sp)-H bond stannylation with hydrostannanes
Arynes were found to insert into a carbonâtin bond of
alkynyl- and vinylstannanes in the presence of a catalytic amount of a
palladiumâiminophosphine complex to afford ortho-substituted
arylstannanes, which were convertible into a wide variety of
1,2-disubstituted arenes via carbonâcarbon bond forming
reactions.
Selective Green Coupling of Alkynyltins and Allylic Halides to Trienynes via a Tandem Double Stille Reaction
作者:Isabel Meana、Ana C. Albéniz、Pablo Espinet
DOI:10.1002/adsc.201000430
日期:2010.11.22
The palladium-catalyzed reaction of alkynyltin compounds with allylic chlorides leads to a 2:2 coupling to give trienynes by regio- and stereoselective formation of three new CC bonds. The reaction can be applied to different alkynyl and allylic fragments, providing a wide range of trienynes with different substitution patterns in very good yields. They can be prepared in a green way using recyclable
Hydrozirconation of Stannylacetylenes. Synthesis and Reactions of Ketene Stannyl(Telluro) Acetals
作者:Miguel J. Dabdoub、Adriano C. M. Baroni
DOI:10.1021/jo991015m
日期:2000.1.1
ketene stannyl(seleno) acetals 12. Otherwise, the use of 1.4 equiv of Cp(2)Zr(H)Cl and 1.0 equiv of PhSeBr results in the exclusive formation of 12, in good yields. Treatment of ketene stannyl(telluro) acetals with iodine or NBS followed by reductive dehalogenation results in the formation of 1-iodo-1-telluroalkenes 4a-e and 1-bromo-1-telluroalkenes 5a-e, respectively, with total retention of the configuration