Synthesis of carbohydrates via tandem use of the osmium-catalyzed asymmetric dihydroxylation and enzyme-catalyzed aldol addition reactions
作者:Ian Henderson、K. Barry Sharpless、Chi Huey Wong
DOI:10.1021/ja00081a016
日期:1994.1
A new strategy is described for the asymmetric synthesis of carbohydrate derivatives via the tandem use of the osmium-catalyzed asymmetric dihydroxylation (AD) and aldolase-catalyzed aldol addition reactions. Both D- and L-forms of fructose, 6-deoxy-galacto-2-heptulose, and 6-phenyl-galacto-2-hexulose were synthesized to illustrate this methodology.
Recombinant 2-Deoxyribose-5-phosphate Aldolase in Organic Synthesis: Use of Sequential Two-Substrate and Three-Substrate Aldol Reactions
作者:Chi-Huey Wong、Eduardo Garcia-Junceda、Lihren Chen、Olga Blanco、Harrie J. M. Gijsen、Darryl H. Steensma
DOI:10.1021/ja00117a003
日期:1995.3
A new procedure has been developed for the large scale preparation of recombinant 2-deoxyribose-5-phosphate aldolase (DERA, EC 4.1.2.4) from E. coli strain DH5 alpha (ATCC 86963). The enzyme was purified to homogeneity with an overall yield of 83% and in sufficient quantity to grow crystals suitable for X-ray diffraction studies. Using the sequential two- or three-substrate aldol reaction, DERA was applied to the synthesis of a variety of sugar analogs including deoxyriboses, 2-deoxyfucose analogs, dideoxyhexoses, trideoxyhexoses, deoxythiosugars, and C-13-substituted 2-deoxyribose-5-phosphate.
SNYDER, J. R.;SERIANNI, A. S., CARBOHYDR. RES., 163,(1987) N 2, 169-188