Stereoselectivity in the Epoxidation of Carbohydrate-Based Oxepines
作者:Shankar D. Markad、Shijing Xia、Nicole L. Snyder、Bikash Surana、Martha D. Morton、Christopher M. Hadad、Mark W. Peczuh
DOI:10.1021/jo800979a
日期:2008.8.1
the DMDO epoxidation of carbohydrate-based oxepines derived from glucose, galactose, and mannose has been determined by product analysis and density functional theory (DFT, B3LYP/6-31+G**//B3LYP/6-31G*) calculations. Oxepines 3 and 4, derived from d-galactose and d-mannose, largely favor α- over β-epoxidation. The results reported here, along with selectivities in the DMDO-mediated epoxidation of d-xylose-based
Carbohydrate-based oxepines: ring expanded glycals for the synthesis of septanose saccharides
作者:Mark W. Peczuh、Nicole L. Snyder
DOI:10.1016/s0040-4039(03)00849-9
日期:2003.5
investigate how factors such as rigidification and deoxygenation mediate RCM using the Grubbs or Schrock catalyst. The seven-membered cyclic enol ethers are ring expanded glycals to be used in the synthesis of septanose carbohydrates.
Synthesis of a Diacetonide-Protected, Mannose-Based Oxepine: Configurational Control of Anomeric Acetate Activation
作者:Bryant Pero、Mark W. Peczuh
DOI:10.1021/acs.joc.2c00206
日期:2022.6.3
been used as intermediates in the preparation of septanose carbohydrates by functionalization through their double bond. Reported here is a newsynthesis of a carbohydrate based oxepine that uses 2,3;4,6-di-O-acetonide mannose as a keystartingmaterial. The oxepine is an important precursor used in the synthesis of septanose glycomimetics of mannopyranosides. The central feature of the synthesis is