Selective hydroboration of terminal alkenes in the presence of aldehydes and ketones
作者:George W. Kabalka、Su Yu、Nan-Sheng Li
DOI:10.1016/s0040-4039(97)01221-5
日期:1997.8
The hydroboration of olefinic ketones and aldehydes with dicyclohexylborane gives the corresponding hydroxy aldehydes and ketones in good yields after oxidation with sodium perborate.
Selective hydroboration of alkenes and alkynes in the presence of aldehydes and ketones
作者:George W Kabalka、Su Yu、Nan-Sheng Li
DOI:10.1139/v98-042
日期:1998.6.1
reactions of terminal alkenes in the presence of ketones or aldehydes with a variety of borane reagents have been investigated. It was found that the selective hydroboration of a terminal alkene in the presence of a ketone or an aldehyde is most efficient when dicyclohexylborane is used as the hydroborating agent. The hydroboration of olefinic ketones and olefinic aldehydes with dicyclohexylborane generates
作者:Yu. N. Ogibin、A. O. Terent"ev、V. P. Ananikov、G. I. Nikishin
DOI:10.1023/a:1015009603719
日期:——
Hydroperoxidation of C=C-bridged 2-oxabicycloalkenes in which the five- or six-membered oxacycle is fused with the five-, six-, or twelve-membered hydrocarbon ring was studied. The Cu(OAc)(2)-catalyzed decomposition of the resulting hydroperoxides afforded nine-, ten-, or fifteen-membered trans-alkenolides, respectively. The latter compounds were obtained as pairs of regioisomers, with the isomers in which the double bond is more remote from the ether oxygen atom predominating.