TMSOTf-Catalyzed Silylation: Streamlined Regioselective One-Pot Protection and Acetylation of Carbohydrates
作者:A. Abragam Joseph、Ved Prakash Verma、Xin-Yi Liu、Chia-Hui Wu、Vijay M. Dhurandhare、Cheng-Chung Wang
DOI:10.1002/ejoc.201101267
日期:2012.2
A highly efficient TMSOTf-catalyzed HMDS silylation of sugars, which can easily be integrated with subsequent reactions in one-pot fashion, has been developed. Its usefulness was demonstrated by applications to streamlined regioselectiveone-potprotection and nonenzymatic acetylation of un
Stereoselective Synthesis of α-<i>C</i>-Glycopyranosyl Isoprenoid Compounds
作者:Anne Jégou、Carole Pacheco、Alain Veyrières
DOI:10.1055/s-1998-3125
日期:1998.1
Addition of the allylsilane Me3SiCH2C:CH2CH2CO2Me (3) to d-gluco and d-galactopyranosyl derivatives gives in good yields 3-(α-C-glycopyranosylmethyl)-but-3-enoates which can undergo oxidation to β-ketoesters, electrophile-promoted cyclizations or double bond migration.
Stereoselective synthesis of - and d-galactopyranosyl glycosides from an isoprenoid synthon
作者:Anne Jégou、Carole Pacheco、Alain Veyrières
DOI:10.1016/s0040-4020(98)00926-0
日期:1998.12
Addition of the allylsilane Me3SiCH2C:CH2CH2CO2Me to d-gluco and d-galactopyranosyl derivatives gives in good yields α-C-glycopyranosides which are easily converted into glycosylated β-keto esters, butenolide and dihydropyrone.
将烯丙基硅烷Me 3 SiCH 2 C:CH 2 CH 2 CO 2 Me加到d-葡萄糖和d-吡喃半乳糖基衍生物中,可以得到高产率的α - C-糖吡喃糖苷,它们很容易转化为糖基化的β-酮酸酯,丁烯内酯和二氢吡喃酮。
Novel eco-friendly solution for the regioselective acetylation of per-O-TMS carbohydrates
作者:Lina Jin、Xianya Mao、Zhikun Wang、Yangyi Mao、Jianwei Mao、Yanli Cui
DOI:10.1016/j.carres.2020.108074
日期:2020.9
Regioselective acetylation of per-O-TMS carbohydrates was achieved preferentially at the 6 position or 1,6-position under mild conditions involving the eco-friendly solvent acetonitrile, at room temperature, in ambient atmosphere and in a shorter time. Good or moderate yields were obtained via 4-dimethylaminopyridine, without auxiliary equipment. A single α-O-Acetyl acetylation anomer was exclusively
One-pot Dess-Martin periodinane-mediated oxidative deprotection and olefination of trimethylsilyl-protected pyranosides and pyranoses
作者:Rowan G. Glover、David P. Soulsby
DOI:10.1016/j.carres.2023.108904
日期:2023.10
periodinane-mediated oxidation deprotection. This is followed by addition of stabilized and non-stabilized ylides to generate alkenoate carbohydrates and related analogs in good to moderate yields. We also report on the rapid deprotection of the remaining trimethylsilyl ether groups in near quantitative yields using an acidic resin-mediated ethanolysis.