An improved dominohydroformylation/benzoincondensation to give α‐hydroxy ketones has been developed. Easily available olefins are smoothly converted into the corresponding α‐hydroxy ketones in high yields with excellent regioselectivities. Key to success is the use of a specific catalytic system consisting of a rhodium/phosphine complex and the CO2 adduct of an N‐heterocyclic carbene.
Acyloins are efficiently synthesized in three steps from alkynes via hydrosilylation followed by an addition-type ozoneoxidation and hydrogenation. The key intermediate α-silylperoxy ketone is con...
REDUCTIVE COUPLING OF<i>S</i>-(2-PYRIDYL) ALIPHATIC THIOATES BY USE OF BIS(1,5-CYCLOOCTADIENE)NICKEL
作者:Makoto Onaka、Yoshio Matsuoka、Teruaki Mukaiyama
DOI:10.1246/cl.1980.905
日期:1980.8.5
S-(2-Pyridyl) aliphatic thioates are reductively dimerized to give α-diketones and α-hydroxy ketones on treatment with bis(1,5-cyclooctadiene)nickel at 40°C.
作者:Timothy J. Donohoe、Ali Jahanshahi、Michael J. Tucker、Farrah L. Bhatti、Ishmael A. Roslan、Mikhail Kabeshov、Gail Wrigley
DOI:10.1039/c1cc11654a
日期:——
A synthetic method for conducting the acyloin reaction using electron transfer in solution is reported. By linking two estersvia their oxygen atoms, it was possible to perform crossed acyloin reactions between two different ester functionalities and display a high degree of preference for an intramolecular coupling process.