A lead-promoted allylation of carbonylcompounds with allyl bromide in a Pb/Bu4NBr/Me3SiCl/DMF system has been performed in good yields with high chemoselectivities: RCHO > R1R2CO > R1CH(OH)CO2R2>> R1CO2R2, lactone, (RCO)2O, and RCOCl.
Muscle-Relaxing Compounds Similar to 3-(o-Toloxy)-1,2-propanediol. II. Substituted Alkanediols<sup>1</sup>
作者:Harry L. Yale、Edward J. Pribyl、William Braker、Jack Bernstein、W. A. Lott
DOI:10.1021/ja01164a108
日期:1950.8
Tandem olefin metathesis/hydrogenation at ambient temperature: activation of ruthenium carbene complexes by addition of hydrides
作者:Bernd Schmidt、Michael Pohler
DOI:10.1039/b303441k
日期:——
catalyze hydrogenation reactions subsequent to ring closing olefinmetathesis. Under these conditions, hydrogenation of cyclopentenols proceeds smoothly at ambient temperature and under 1 atm of hydrogen in toluene. An alternative protocol was developed that involves the formation of hydrogen in situ by reaction of excess sodium hydride with protic functional groups and water.