Process for Producing 1,2-Trans-Glycoside Compound
申请人:Yamago Shigeru
公开号:US20080177049A1
公开(公告)日:2008-07-24
In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent
wherein R
2
and R
3
are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R
2
and R
3
are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.
PROCESS FOR PRODUCING 1,2-TRANS-GLYCOSIDE COMPOUND
申请人:Yamago Shigeru
公开号:US20120232256A1
公开(公告)日:2012-09-13
In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent
wherein R
2
and R
3
are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R
2
and R
3
are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.
作者:Jianguo An、Jeffrey M. Wilson、Yi-Zhong An、David F. Wiemer
DOI:10.1021/jo9518157
日期:1996.1.1
nonracemic diols and amino alcohols have been tested for their utility as chiral auxiliaries in vinyl phosphate/beta-keto phosphonate rearrangements. When (2R,4R)- or (2S,4S)-pentane-2,4-diol were employed, the diastereomeric beta-keto phosphonates obtained from three prochiral cyclohexanones gave separate resonances in their respective (31)P NMR spectra, allowing estimation of diastereomeric excess