Chemoselectivereduction of various carbonyl compounds to alcohols with ammonia borane (AB), a nontoxic, environmentally benign, and easily handled reagent, in neat water was achieved in quantitative conversions and high isolated yields. Interestingly, α- and β-keto esters were selectively reduced to corresponding hydroxyl esters by AB, while diols were obtained when sodiumborohydride was used as
H-Bonding-promoted radical addition of simple alcohols to unactivated alkenes
作者:Yunfei Tian、Zhong-Quan Liu
DOI:10.1039/c7gc02540h
日期:——
An H-bonding-induced radicaladdition of simple alcohols to unactivated olefins was achieved. It effectively solved the long-standing problems of reactivity and selectivity in this type of reactions. The hydroxyalkylation occurred via site-specific cleavage of the α-hydroxyl-C-H bond in alcohols. This method allows a highly atom-economic, operationally simple and environmentally benign access to diverse
A convenient and practical method for the selective benzoylation of primary hydroxyl groups using microwave heating
作者:Stephen Caddick、Andrew J McCarroll、David A Sandham
DOI:10.1016/s0040-4020(01)00592-0
日期:2001.7
A convenient method for the selective protection of primary hydroxyl groups in 1,n diols is described. The use of microwave heating is shown to be advantageous. (C) 2001 Elsevier Science Ltd. All rights reserved.
Highly selective acylation of di- and polyhydroxyl compounds by 3-acylthiazolidine-2-thiones