The preparation of optically active boronic ester substituted Δ2-isoxazolines
作者:Richard H Wallace、K.K Zong
DOI:10.1016/s0022-328x(99)00055-8
日期:1999.6
In this paper we report our recent results in the area of nitrile oxide cycloaddition to opticallyactive vinylboronic esters to afford opticallyactive boronic ester substituted Δ2-isoxazolines. In these studies, a number of opticallyactivediols were investigated and TADDOLs have been found to afford the best diastereoselectivity. The mixture of diastereomers obtained in these reactions can be readily
Synthesis and reactions of some substituted 1-phenylethaneboronic esters
作者:D.S. Matteson、R.A. Bowie、G. Srivastava
DOI:10.1016/s0022-328x(00)81633-2
日期:1969.1
synthesized by hydrogenation of the α-styreneboronic esters. An alternative synthesis involving rearrangement of aryl(α-haloethyl)borinic esters was also explored with partially successful results. Other substituted 1-phenylethaneboronic esters prepared from dibutyl α-styreneboronate included the α-bromo, α-butoxy, and α-dibutoxyboryl derivatives. Displacement of boron by mercuric chloride has been surveyed