Synthesis of dienoic acids and esters by cationic palladium complex catalyzed carbonylation of alkynols and alkynediols
作者:Keun Tae Huh、Akihiro Orita、Howard Alper
DOI:10.1021/jo00077a008
日期:1993.12
The cationic palladium(II) aquo hydride, trans-(Cy3P)2Pd(H)(H2O)+BF4-, is an excellent catalyst for the carbonylation of alkynols to dienoic acids and esters and of alkynediols to cross-conjugated diesters.
Photolyses directes et sensibilisees d'homopyrazolenines et de bis Δ1-pyrazolines.
The oxidation of tetramethylbutatriene(hexacarbonyl)diiron in alcohols by eerie ammonium nitrite regioselectively gives diene-diesters and acetylene-diethers in moderate yields. The reaction is the first example showing that both the carbonylation and etherification of cumulene ligand with solvent alcohols take place concurrently on cationic 17-electron species.