1397283-36-1Relevant academic research and scientific papers
CuCl-K2CO3-catalyzed highly selective borylcupration of internal alkynes - Ligand effect
Yuan, Weiming,Ma, Shengming
supporting information; experimental part, p. 7266 - 7268 (2012/10/07)
An efficient and practical copper-catalyzed highly regio- and stereoselective borylcupration of internal alkynes with bis(pinacolato)diboron using a catalytic amount of K2CO3 as base producing Z-alkenylboron compounds has been demonstrated by applying the ligand effect: commercially available electron-rich tris(p-methoxyphenyl) phosphine ensures a smooth and efficient reaction. Functionalized alkynes, such as propargylic alcohols and derivatives as well as N-propargyl tosylamide, may also be used with excellent selectivity.
Ligand controlled highly selective copper-catalyzed borylcuprations of allenes with bis(pinacolato)diboron
Yuan, Weiming,Ma, Shengming
supporting information; experimental part, p. 1867 - 1872 (2012/09/22)
Copper-catalyzed highly selective borylcuprations of allenes with bis(pinacolato)diboron produce two different types of alkenylboranes by applying a ligand effect. In the presence of tris(para-methoxyphenyl)phosphine [P(C 6H4OMe-p)3], the reaction of aryl-1,2-dienes affords 2-alken-2-yl boronates as the only product with exclusive Z-geometry; the regioselectivity is switched to afford the 1-alken-2-yl boronates as the major products when the bidentate phosphine 2,2'-bis(diphenylphosphino)biphenyl is used as the ligand. Copyright
