Two contrasting ethynyl hydroboration pathways in the formation of a novel tris-hydroboration product from reaction of dimesitylborane with 2,5-diethynylpyridine†,10.1039/B316250H

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Two contrasting ethynyl hydroboration pathways in the formation of a novel tris-hydroboration product from reaction of dimesitylborane with 2,5-diethynylpyridine†

Christopher D. Entwistle,Andrei S. Batsanov,Judith A. K. Howard,Mark A. Fox,Todd B. Marder

Chemical Communications Pub Date : 02/13/2004 00:00:00 , DOI:10.1039/B316250H

Abstract

Reaction of 2,5-diethynylpyridine with dimesitylborane, [(Mes)₂BH]₂ (Mes = mesityl = 2,4,6-Me₃C₆H₂), gave the unexpected tris-hydroboration product 1-{(Mes)₂B}-2-[Z-1-{(Mes)₂B}ethylidene]-5-[E-{(Mes)₂B}vinyl]-1,2-dihydropyridine, which has been structurally characterised by single-crystal X-ray diffraction.