The selective monosilylation of 1,2-diols catalyzed by dimethyltin dichloride was successfully developed. This procedure was applied to various 1,2-diols, giving monosilylated products in good to excellent yields with high chemoselectivity. (C) 2011 Elsevier Ltd. All rights reserved.
Efficient and mild: The selective monoallylation of 1,2‐diols was successfully developed with Pd/Snbimetalliccatalysis in good to excellent yields. This process was carried out with high substrate tolerance under mild conditions (see scheme). The catalyst system achieved the quite high chemoselectivity even in the presence of a 1:1 mixture of the 1,2‐diol and mono‐ol.
Selective Monobenzoylation of 1,2- and 1,3-Diols Catalyzed by Me<sub>2</sub>SnCl<sub>2</sub> in Water (Organic Solvent Free) under Mild Conditions
作者:Wataru Muramatsu、Julius M. William、Osamu Onomura
DOI:10.1021/jo202136a
日期:2012.1.6
We have developed an efficient method for selective monobenzoylation of 1,2- and 1,3-diols in water catalyzed by Me2SnCl2. Treatment of 1,2- and 1,3-diols with benzoyl chlorides, DMT-MM, and potassium carbonate in the presence of a catalytic amount of Me2SnCl2 and DMAP in water at room temperature gave monobenzoates in up to 97% yield.
Chiral copper-catalyzed asymmetric monoarylation of vicinal diols with diaryliodonium salts
The copper-catalyzed enantioselective monoarylation of meso-1,2-diols by the use of diaryliodonium triflates as aryl sources has been developed. The chiral copper(II) complex catalyzed the asymmetric desymmetrization effectively to afford optically active beta-aryloxy alcohols in moderate to high chemical yields and enantioselectivity. (C) 2016 Elsevier Ltd. All rights reserved.