The iodocarbocyclization of the tethered alkyne is an important method for diverse family of cyclic molecules. Using the phosphoryl group as a new linker leads to the formation of α‐iodo‐substituted spiro‐conjugated phosphinolines and phosphepines, which were further transformed to π‐elongated derivatives and provided a phosphepine‐based AIE luminogen.
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
GaBr<sub>3</sub>-catalyzed Coupling between α-Iodo Esters with Alkynylstannanes under UV Irradiation
作者:Itaru Suzuki、Naoto Esumi、Makoto Yasuda、Akio Baba
DOI:10.1246/cl.140888
日期:2015.1.5
A coupling between various alkynylstannanes with α-iodo esters was catalyzed by GaBr3 under UV irradiation conditions, for which a catalytic amount of GaBr3 was essential, and a radical coupling with the generated alkynylgallium species was involved. The desired α-alkynyl esters were selectively obtained even in the presence of an aryl–I bond, which is a reactive site in a conventional palladium-catalyzed system.
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
Synthesis of 2-aryl-1,1-difluoro-1,3-enynes via consecutive cross-coupling reactions of 2,2-difluoro-1-iodoethenyl p-toluenesulfonate
作者:Ju Hee Kim、Ye Rim Jeong、Sung Lan Jeon、In Howa Jeong
DOI:10.1016/j.jfluchem.2014.07.007
日期:2014.11
Alkynylation reaction of 2,2-difluoro-1-iodoethenyl p-toluenesulfonate 1 with alkynyltributylstannanes in the presence of 10 mol% Pd(PPh3)4 and 10 mol% CuI in THF at reflux temperature for 3 h provided the corresponding 1,1-difluoro-1,3-enynyl tosylates 2 in 65–85% yields. The further arylation reaction of 2 with aryltributylstannanes in the presence of 10 mol% Pd(PPh3)2Cl2 and 3 equiv. of LiBr in