Site‐ and Stereoselective Phosphoramidation of Carbohydrates Using a Chiral Catalyst and a Chiral Electrophile
作者:Daniel A. Glazier、John M. Schroeder、Stephanie A. Blaszczyk、Weiping Tang
DOI:10.1002/adsc.201900382
日期:2019.8.21
phosphorus center. As such, the site‐ and stereoselective phosphoramidation of carbohydrates has never been achieved. We have developed the first site‐ and stereoselective phosphoramidation reaction of carbohydrates using a chiral catalyst and a chiral electrophile. This method offers a convenient solution for the selective synthesis of phosphoramidated carbohydrate‐containing prodrugs and natural products
Enantiomerically Pure α,β-Unsaturated Five-Membered-Ring Aldehydes by Ring Contraction of Epoxyhexopyranosides
作者:Fritiof Pontén、Göran Magnusson
DOI:10.1021/jo970666k
日期:1997.11.1
single, enantiomerically pure, alpha,beta-unsaturated furanosidic aldehyde. Similar ring contraction of a C-propylglycosidic analog of one of the epoxyhexopyranosides gave a mixture of two diastereomeric aldehydes. This finding supports the previously suggested mechanism of the reaction and indicates that O-glycosidic epoxypyranosides also rearrange into two aldehydes, one of which is unstable.