Diisobutylaluminum borohydride: An efficient reagent for the reduction of tertiary amides to the corresponding amines under ambient conditions
作者:Rachel A. Snelling、Gabriella Amberchan、Angel Resendez、Chris L. Murphy、Lauren Porter、Bakthan Singaram
DOI:10.1016/j.tetlet.2017.09.030
日期:2017.10
A synthetically simple mixed metal hydride, diisobutylaluminum borohydride [(iBu)2AlBH4], is easily generated from a 1:1 mixture of borane-dimethylsulfide (BMS) and diisobutylaluminum hydride (DIBAL). The reduction of tertiary amides using (iBu)2AlBH4 is complete within five minutes under ambient conditions and the product tertiary amines were isolated in 70–99% yields by a simple acid-base extraction
Reaction of Diisobutylaluminum Borohydride, a Binary Hydride, with Selected Organic Compounds Containing Representative Functional Groups
作者:Gabriella Amberchan、Rachel A. Snelling、Enrique Moya、Madison Landi、Kyle Lutz、Roxanne Gatihi、Bakthan Singaram
DOI:10.1021/acs.joc.0c03062
日期:2021.5.7
from diisobutylaluminum hydride (DIBAL) and borane dimethyl sulfide (BMS) has shown great potential in reducing a variety of organic functional groups. This unique binary hydride, (iBu)2AlBH4, is readily synthesized, versatile, and simple to use. Aldehydes, ketones, esters, and epoxides are reduced very fast to the corresponding alcohols in essentially quantitative yields. This binary hydride can reduce
Lithium compound catalyzed deoxygenative hydroboration of primary, secondary and tertiary amides
作者:Milan Kumar Bisai、Kritika Gour、Tamal Das、Kumar Vanka、Sakya S. Sen
DOI:10.1039/d1dt00364j
日期:——
route for the deoxygenative reduction of primary to tertiary amides to corresponding amines has been achieved with pinacolborane (HBpin) using simple and readily accessible 2,6-di-tert-butyl phenolate lithium·THF (1a) as a catalyst. Both experimental and DFT studies provide mechanistic insight.
herein is the development of a simple but practical catalytic system for the selective reduction of amides with hydrosilane or hydrosiloxane. Low-cost and readily available triethylborane (1.0 M in THF), in combination with a catalytic amount of an alkali metal base, was found to catalyze the reduction of all three amide classes (tertiary, secondary, and primary amides) to form amines under mild conditions
Controlled Reduction of Tertiary Amides to the Corresponding Alcohols, Aldehydes, or Amines Using Dialkylboranes and Aminoborohydride Reagents
作者:Christopher L. Bailey、Alexander Y. Joh、Zefan Q. Hurley、Christopher L. Anderson、Bakthan Singaram
DOI:10.1021/acs.joc.6b00276
日期:2016.5.6
hydride (DIBAL) reagents. Tertiary amides were reduced using 1 or 2 equiv of various dialkylboranes. The reduction of tertiary amides required 2 equiv of 9-borabicyclo[3.3.1]nonane (9-BBN) for complete reduction to give the corresponding tertiary amines. One equivalent of sterically hindered disiamylborane reacts with tertiary amides to afford the corresponding aldehydes. Aminoborohydrides are powerful