dodecanal dimethyl acetal and dodecyl silyl ethers in MeCN–H2O was examined using a catalyticamount of π-acceptors such as 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ), tetracyanoethylene (TCNE), 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (TCNQF4), and chloranil (CA). Cleavage of dodecyl triethylsilyl ether with TCNQ and CA was caused by room light
Symmetrical cyclic and acyclic acetals by oxidation with Oxone® gave the corresponding esters in good yield. Treatment of tetrahydropyranyl derivatives of alcohols with the same reagent resulted in oxidative regeneration of the alcohols.
One-step conversion of silyl/THP ethers into the corresponding acetates
作者:Kusum L Chandra、P Saravanan、Vinod K Singh
DOI:10.1016/s0040-4039(01)00967-4
日期:2001.7
A variety of silyl and THP ethers were directly converted into the corresponding acetates using acetic anhydride in the presence of a catalytic amount of Cu(OTf)(2) in CH2Cl2. It was observed that MEM ethers could also be cleaved under the same conditions. The reaction was also studied with other Lewis acids. (C) 2001 Elsevier Science Ltd. All rights reserved.
A mild method for the deprotection of tetrahydropyranyl (THP) ethers catalyzed by iron(III) tosylate
作者:Matthew R. Bockman、Veronica V. Angeles、Julia M. Martino、Purav P. Vagadia、Ram S. Mohan
DOI:10.1016/j.tetlet.2011.10.068
日期:2011.12
A mild method for the deprotection of THP ethers catalyzed by iron(III) tosylate (2.0 mol %) in CH3OH has been developed. Iron(III) tosylate, Fe(OTs)(3)center dot 6H(2)O, is a commercially available solid that is inexpensive, noncorrosive, and easy to handle. The room temperature reaction conditions make this method attractive for deprotection of a range of THP ethers. (C) 2011 Elsevier Ltd. All rights reserved.