Practical and Efficient Procedure for the In Situ Preparation of B-Alkoxyoxazaborolidines. Enantioselective Reduction of Prochiral Ketones
作者:Viviana Ponzo、Teodoro Kaufman
DOI:10.3390/50300495
日期:——
A new method for the in situ elaboration of B-alkoxyoxazaborolidines is presented. Their use in the enantioselective reduction of prochiral aromatic ketones provides excellent chemical and optical yields of chiral alcohols.
Sodium Aminodiboranate, a New Reagent for Chemoselective Reduction of Aldehydes and Ketones to Alcohols
作者:Xuenian Chen、Jin Wang、Yu Guo、Shouhu Li
DOI:10.1055/a-1479-5008
日期:2021.7
aminodiboranate ((NaNH2(BH3)2, NaADBH) is a new member of the old borane family, which exhibits superior performance in chemoselectivereduction. Experimental results show that NaADBH can rapidly reduce aldehydes and ketones to the corresponding alcohols in high-efficiency and selectivity under mild conditions. There are little steric and electronic effects on this reduction.
METHOD FOR PREPARING BORINIC ACID DERIVATIVES AND NOVEL BORINIC ACID DERIVATIVES
申请人:MANAC INC.
公开号:US20150105562A1
公开(公告)日:2015-04-16
The present invention relates to a method for preparing borinic acid derivatives and novel borinic acid derivatives. The preparing method of the present invention provides borinic acid derivatives of general formula (2):
(Ar
2
B(OH) (2)
wherein
Ar is the same as defined in the description and claims, selectively and in a high yield by reacting a compound of general formula (1):
Ar-M, (1)
wherein
Ar and M are the same as defined in the description and claims, with tri-t-butyl borate and then hydrolyzing the reaction product.
TiCl<sub>4</sub>-Catalyzed Hydroboration of Ketones with Ammonia Borane
作者:P. Veeraraghavan Ramachandran、Abdulkhaliq A. Alawaed、Henry J. Hamann
DOI:10.1021/acs.joc.2c01744
日期:2022.10.7
Investigation of a variety of Lewis acids for the hydroboration-hydrolysis (reduction) of ketones with amine-boranes has revealed that catalytic (10 mol %) titanium tetrachloride (TiCl4) in diethyl ether at room temperature immensely accelerates the reaction of ammonia borane. The product alcohols are produced in good to excellent yields within 30 min, even with ketones which typically requires 24