Abstract New hybrid silica materials M1–M4, derivedfrom mono and bis-silylated aryl iodides, have been prepared via sol–gel processes, either by the hydrolytic polycondensation of a bis-silylated monomer or by the co-gelification of a monosilylated precursor with tetraethylorthosilicate. They have been fully characterized by elemental analysis, 13C and 29Si CP-MAS solid state NMR, IR, TGA, and nitrogen-sorption
Solvent-free synthesis of 1-(p-toluenesulfonyloxy)-1,2-benziodoxol-3(1H)-one from Dess–Martin periodinane and its synthetic utility for α-tosyloxylation of ketones
作者:Nandkishor N. Karade、Girdharilal B. Tiwari、Sandeep V. Shinde、Sumeet V. Gampawar、Jeevan M. Kondre
DOI:10.1016/j.tetlet.2008.03.119
日期:2008.5
The solvent-free synthesis of 1-(p-toluenesulfonyloxy)-1,2-benziodoxol-3(1H)-one is reported from Dess–Martin periodinane and p-toluenesulfonic acid monohydrate using a grinding technique and is subsequently utilized for the α-tosyloxylation of a range of enolisable ketones.
Hypervalent-iodine-mediated oxidation followed by the acetoxylation/tosylation of α-substituted benzylamines to obtain α-acyloxy/tosyloxy ketones
作者:Bapurao D. Rupanawar、Kishor D. Mane、Gurunath Suryavanshi
DOI:10.1039/d2nj02271k
日期:——
An efficient and metal-free method has been developed for the sequential oxidation of α-alkylbenzylamines followed by acetoxylation or tosylation for the synthesis of α-acyloxy/tosyloxy ketones using hypervalent iodine(III). The employment of a simple starting material, broad substrate scope and operational simplicity are the key features of this protocol.
已经开发了一种高效且无金属的方法,用于顺序氧化 α-烷基苄胺,然后使用高价碘 ( III ) 进行乙酰氧基化或甲苯磺酰化合成 α-酰氧基/甲苯磺酰氧基酮。使用简单的起始材料、广泛的底物范围和操作简单是该协议的主要特点。
Enantioselective synthesis of 1-arylethanediols by rhodium-catalyzed transfer hydrogenation of α-tosyloxyarylketones
作者:Do-Min Lee、Gullapalli Kumaraswamy、Kee-In Lee
DOI:10.1007/s00706-008-0009-2
日期:2009.1
Catalytic transfer hydrogenation of alpha-tosyloxyarylketones mediated by a chiral rhodium complex using an azeotropic mixture of formic acid/triethylamine afforded the corresponding 1-arylethanediol monotosylates in excellent yield with high enantioselectivity.