Efficient Addition Reaction of Dibutylphosphane Oxide with Alkynes: New Mechanistic Proposal Involving a Duo of Palladium and Brønsted Acid
作者:Jun Kanada、Masato Tanaka
DOI:10.1002/adsc.201000758
日期:2011.4.18
The addition reaction of dibutylphosphane oxide [Bu2P(O)H] with alkynes proceeds efficiently in the presence of palladium‐chelating phosphane–Brønsted acid catalyst systems. Terminal alkynes afford branched‐structured products selectively. On the other hand, the same reaction using monodentate phosphane ligands or the reaction run in the absence of a Brønsted acid affords a much lower yield. A mechanistic
Transition metal-free and regioselective vinylation of phosphine oxides and <i>H</i>-phosphinates with VBX reagents
作者:Laura Castoldi、Adam A. Rajkiewicz、Berit Olofsson
DOI:10.1039/d0cc05992g
日期:——
Vinylbenziodoxolones (VBX) were demonstrated as efficient, metal-free P-vinylation reagents with complete regioselectivity in favor of the terminal alkenes.