Trialkylboranes derived from terminal, cyclic and bicyclic olefins via hydroboration with 5 mole percent excess borane undergo ready redistribution with boron trichloride at 110° to give the corresponding alkyldichloroboranes, providing a convenient synthesis of such derivatives. On the other hand, trialkylboranes derived from internal olefins, such as 3-hexene, undergo this reaction more sluggishly
Generation of Organolithium Compounds bearing Super Silyl Ester and their Application to Matteson Rearrangement
作者:Susumu Oda、Hisashi Yamamoto
DOI:10.1002/anie.201304225
日期:2013.7.29
It's super‐silyl‐fragilithyl‐ester‐aryl‐docious: The super silylgroup is a strong protecting group for carboxylic acids and provides a method for direct lithiation that is compatible with the ester moiety. Organolithium compounds bearing a super silyl ester react with a variety of electrophiles in high yields (see scheme). The reaction of lithiated super silyl chloroacetate with a boron compound gives
THE REACTION OF TRIALKYLBORANES WITH THE (α-LITHIO DERIVATIVES OF BIS(PHENYLTHIO)METHANE AND OF 1,1-BIS(PHENYLTHIO)PENTANE. A CONVENIENT METHOD FOR THE PREPARATION OF ALDEHYDES AND KETONES
作者:Shoji Yamamoto、Manzo Shiono、Teruaki Mukaiyama
DOI:10.1246/cl.1973.961
日期:1973.9.5
It was found that various aldehydes and ketones were readily prepared in good yields by the reactions of α-lithio derivatives of thioacetals with trialkylboranes.