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
作者:SNYDER, J. R.、SERIANNI, A. S.
DOI:——
日期:——
Synthesis and n.m.r.-spectral analysis of unenriched and [1-13C]-enriched 5-deoxypentoses and 5-O-methylpentoses
作者:Joseph R. Snyder、Anthony S. Serianni
DOI:10.1016/0008-6215(87)80180-5
日期:1987.6
preparing unenriched and [1-13C]-enriched 5-deoxy- and 5-O-methyl-pentoses in the D or L configuration. The 1H-n.m.r. spectra of these compounds have been interpreted, and the 13C-n.m.r. spectra assigned with the aid of 2-D 13C-1H chemical-shift correlation spectroscopy. Tautomeric forms (furanoses, hydrate, and aldehyde) in solution in 2H2O have been quantified with the aid of [1-13C]-enriched derivatives
Enzymatic synthesis of “natural-labeled” 6-deoxy-L-sorbose precursor of an important food flavor
作者:L. Hecquet、J. Bolte、C. Demuynck
DOI:10.1016/0040-4020(96)00379-1
日期:1996.6
A biological route to natural 6-deoxy-L-sorbose is described. This method is based on the production of natural hydroxypyruvate and 4-deoxy-L-threose and their conversion into 6-deoxy-L-sorbose: hydroxypyruvate is obtained from L-serine by serine : glyoxylate aminotransferase catalysis, 4-deoxy-L-threose is obtained by microbial isomerization of 4-deoxy-L-erythrulose, this last being obtained from