ACCELERATED REDUCTION OF ORGANIC SUBSTANCES WITH BORANES
申请人:Burkhardt Elizabeth
公开号:US20090082568A1
公开(公告)日:2009-03-26
In a process for the accelerated reduction of organic substrates, selected from the group consisting of ester, amides, nitriles, acids, ketones, imines or mixtures thereof, the substrates are reacted with an amine borane, sulfide borane or ether borane complex as a borane source in the presence of organic accelerator compounds containing both Lewis acidic and Lewis basic sites in their structure, of which the Lewis acidic site can coordinate with the carbonyl or nitrile or imine group of the substrate and the Lewis basic site can coordinate with the borane.
Heller, Gert; Seeger, Karlheinz, Zeitschrift fur Naturforschung, B: Chemical Sciences, 1988, vol. 43, # 5, p. 547 - 556
作者:Heller, Gert、Seeger, Karlheinz
DOI:——
日期:——
Spiroborate catalyzed reductions with N,N-diethylaniline borane
作者:Brian M. Coleridge、Thomas P. Angert、Lucas R. Marks、Patrick N. Hamilton、Christopher P. Sutton、Karl Matos、Elizabeth R. Burkhardt
DOI:10.1016/j.tetlet.2010.09.022
日期:2010.11
Reduction of esters, amides, and ketones by N,N-diethylaniline borane is accelerated by catalysts derived from spiroborate complexes. Esters are reduced at ambient temperature in less than 4 h with this amine borane and 5 mol % spiroborate 6. Functional group selectivity shows ketone and tertiary amide reduction is faster than ester or nitrile reduction.