D-甘露糖

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The synthesis of all other UDP-sugars in Table 6 was carried out using the one-pot three-enzyme system shown in FIG. 9. As shown in Table 6, the one-pot three-enzyme system provided excellent yields for the formation of UDP-Gal (T6-16, 86%), UDP-ManF (T6-27, 92%), and UDP-ManN3 (T6-29, 90%) from the corresponding monosaccharides Gal (T6-1), ManF (T6-12), and ManN3 (T6-14), respectively. Three of the derivatives of UDP-Glc including UDP-2-deoxyGlc (T6-22), UDP-GlcNH2 (T6-23), and UDP-GlcN3 (T6-24) were obtained from 2-deoxyGlc (T6-7), glucosamine (GlcNH2, T6-8) and GlcN3 (T6-9) in 56%, 43%, and 61% yields, respectively. The moderate yields for these three compounds may be attributed by less optimal NahK kinase activity for GlcNH2 (T6-8) and GlcN3 (T6-9), and the less optimal BLUSP activity for 2-deoxyGlc (T6-7). UDP-Man (T6-26) was synthesized from Man (T6-11) in moderate 60% yield using the one-pot three-enzyme system and the moderate yield was most likely due to the less optimal activity of BLUSP towards Man-1-P. The synthesis of four UDP-Gal derivatives including its 2-deoxy, 2-deoxy-2-amido-, 2-deoxy-2-azido-, and 2-deoxy-2-acetamido-derivatives (T6-17-T6-20) using the one-pot three-enzyme system was not successful. In addition, UDP-GlcNAc (T6-25), UDP-ManNH2 (T6-28), and UDP-ManNAc (T6-30) could not be produced from the corresponding monosaccharides (T6-10, T6-13, and T6-15) using the one-pot three-enzyme system. These were most likely due to the substrate restriction of BLUSP instead of kinases used. T6-8) and GlcN3 (T6-9) in 56%, 43%, and 61% yields The moderate yields for these three compounds the moderate yield

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Analogously to what is described in the literature [M. L. Wolfrom and A. Thompson in Methods in Carbohydrate Chemistry (R. L. Whistler, M. L. Wolfrom and J. N. BeMiller, Eds.), Academic Press, New York, Vol. II, 53, pp. 211-215, (1963)], the reaction of 150 g (832.5 mmol) of α,β-D-mannopyranose with a mixture that consists of 1500 ml of absolute pyridine and 1500 ml of acetic acid anhydride yields, after working-up, 315 g (96.7%) of the above-mentioned title compound as a crude product in the form of a viscous and colorless oil. By 1H-NMR spectroscopic study of the thus obtained title compound, it was possible to determine the α to β ratio of both anomers at 4:1. Separation of α,β-anomers of the above-mentioned title compound can be eliminated to perform the subsequent reaction step. yields

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Man adds triethylamine (5.68 ml) to a stirred suspension of p-nitrobenzyl α-[3-benzyl-7-oxo-4-thia-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl]-α-(1-hydroxyethylidene)acetate (9.06 g) in tetrahydrofuran (120 ml) under nitrogen atmosphere at -20° C. to give clear solution, adds methanesulfonyl chloride (1.65 ml) to the solution, stirs for 30 minutes at the same temperature, adds morpholine (1.92 ml), warms to 0° C., stirs for 5 hours, cools to -30° C. to -35° C., adds pyridine (1.54 ml) and bromine (3.12 g), stirs for 20 minutes, warms to ice-water temperatur, adds 5% hydrochloric acid (144 ml) and methanol (120 ml), stirs for 3 hours at room temperature, and lefts stand overnight at 0° C. Collection of the separated crystals in the reaction mixture by filtration gives p-nitrobenzyl 7-phenylacetamido-3-hydroxy-3-cephem-4-carboxylate (6.678 g). m.p. 201° C. Yield: 71%. to give clear solution warms to 0° C. stirs for 20 minutes stirs for 3 hours at room temperature lefts stand overnight at 0° C Collection of the separated crystals in the reaction mixture by filtration

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Man adds triethylamine (5.68 ml) to a stirred suspension of p-nitrobenzyl α-[3-benzyl-7-oxo-4-thia-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl]-α-(1-hydroxyethylidene)acetate (9.06 g) in tetrahydrofuran (120 ml) under nitrogen atmosphere at -20° C. to give clear solution, adds methanesulfonyl chloride (1.65 ml) to the solution, stirs for 30 minutes at the same temperature, adds morpholine (1.92 ml), warms to 0° C., stirs for 5 hours, cools to -30° C. to -35° C., adds pyridine (1.54 ml) and bromine (3.12 g), stirs for 20 minutes, warms to ice-water temperatur, adds 5% hydrochloric acid (144 ml) and methanol (120 ml), stirs for 3 hours at room temperature, and lefts stand overnight at 0° C. Collection of the separated crystals in the reaction mixture by filtration gives p-nitrobenzyl 7-phenylacetamido-3-hydroxy-3-cephem-4-carboxylate (6.678 g). m.p. 201° C. Yield: 71%. to give clear solution warms to 0° C. stirs for 20 minutes stirs for 3 hours at room temperature lefts stand overnight at 0° C Collection of the separated crystals in the reaction mixture by filtration

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Analogously to what is described in the literature [M. L. Wolfrom and A. Thompson in Methods in Carbohydrate Chemistry (R. L. Whistler, M. L. Wolfrom and J. N. BeMiller, Eds.), Academic Press, New York, Vol. II, 53, pp. 211-215, (1963)], the reaction of 150 g (832.5 mmol) of α,β-D-mannopyranose with a mixture that consists of 1500 ml of absolute pyridine and 1500 ml of acetic acid anhydride yields, after working-up, 315 g (96.7%) of the above-mentioned title compound as a crude product in the form of a viscous and colorless oil. By 1H-NMR spectroscopic study of the thus obtained title compound, it was possible to determine the a to β ratio of both anomers at 4:1. Separation of the α,β-anomers of the above-mentioned title compound can be eliminated to carry out the reaction steps below. yields

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Analogously, as described in the literature [M. L. Wolfrom and A. Thompson in Methods in Carbohydrate Chemistry (R. L. Whistler, M. L. Wolfrom and J. N. BeMiller, Eds.), Academic Press, New York, Vol. II, 53, pp. 211-215, (1963)], the reaction of 150 g (832.5 mmol) of α,β-D-mannopyranose with a mixture that consists of 1500 ml of absolute pyridine and 1500 ml of acetic acid anhydride after working-up yields 315 g (96.7%) of the above-mentioned title compound as crude product in the form of a viscous and colorless oil. By 1H-NMR-spectroscopic study of the thus obtained title compound, it was possible to determine the α to β ratio of both anomers at 4:1. A separation of the α,β-anomers of the above-mentioned title compound can thus be eliminated in performing the subsequent reaction steps.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Analogously, as described in the literature [M. L. Wolfrom and A. Thompson in Methods in Carbohydrate Chemistry (R. L. Whistler, M. L. Wolfrom and J. N. BeMiller, Eds.), Academic Press, New York, Vol. II, 53, pp. 211-215, (1963)], the reaction of 150 g (832.5 mmol) of α,β-D-mannopyranose with a mixture that consists of 1500 ml of absolute pyridine and 1500 ml of acetic acid anhydride after working-up yields 315 g (96.7%) of the above-mentioned title compound as crude product in the form of a viscous and colorless oil. By 1H-NMR-spectroscopic study of the thus obtained title compound, it was possible to determine the α to β ratio of both anomers at 4:1. A separation of the α,β-anomers of the above-mentioned title compound can thus be eliminated in performing the subsequent reaction steps.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Solutions of Glu (40 mM-4.0 μM), Fru (0.4 mM), Gal (0.4 mM) and Man (0.4 mM) in deionized water were prepared. An aliquot (2.0 mL) of the solution of TPEDB (0.1 mM) in the carbonate buffer containing 4 vol % DMSO was added into a 10 mL volumetric flask, followed by the addition of 1.0 mL of a solution of Fru (0.4 mM) and 1.0 mL of a solution of Glu (40 mM). After shaking for a few seconds, a solution of TPEDB (50 μM) with 10 mM of Glu and 0.1 mM of Fru in the carbonate buffer containing 2% DMSO was obtained. The solution was allowed to stand for 30 min before its FL measurement. The solution of TPEDB and Glu containing another saccharide (Gal or Man) was prepared by similar procedures. was added into a 10 mL volumetric flask was obtained

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Man 32.8; Glc 188.3

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The synthesis of all other UDP-sugars in Table 6 was carried out using the one-pot three-enzyme system shown in FIG. 9. As shown in Table 6, the one-pot three-enzyme system provided excellent yields for the formation of UDP-Gal (T6-16, 86%), UDP-ManF (T6-27, 92%), and UDP-ManN3 (T6-29, 90%) from the corresponding monosaccharides Gal (T6-1), ManF (T6-12), and ManN3 (T6-14), respectively. Three of the derivatives of UDP-Glc including UDP-2-deoxyGlc (T6-22), UDP-GlcNH2 (T6-23), and UDP-GlcN3 (T6-24) were obtained from 2-deoxyGlc (T6-7), glucosamine (GlcNH2, T6-8) and GlcN3 (T6-9) in 56%, 43%, and 61% yields, respectively. The moderate yields for these three compounds may be attributed by less optimal NahK kinase activity for GlcNH2 (T6-8) and GlcN3 (T6-9), and the less optimal BLUSP activity for 2-deoxyGlc (T6-7). UDP-Man (T6-26) was synthesized from Man (T6-11) in moderate 60% yield using the one-pot three-enzyme system and the moderate yield was most likely due to the less optimal activity of BLUSP towards Man-1-P. The synthesis of four UDP-Gal derivatives including its 2-deoxy, 2-deoxy-2-amido-, 2-deoxy-2-azido-, and 2-deoxy-2-acetamido-derivatives (T6-17-T6-20) using the one-pot three-enzyme system was not successful. In addition, UDP-GlcNAc (T6-25), UDP-ManNH2 (T6-28), and UDP-ManNAc (T6-30) could not be produced from the corresponding monosaccharides (T6-10, T6-13, and T6-15) using the one-pot three-enzyme system. These were most likely due to the substrate restriction of BLUSP instead of kinases used. T6-8) and GlcN3 (T6-9) in 56%, 43%, and 61% yields The moderate yields for these three compounds the moderate yield

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Analogously to what is described in the literature [M. L. Wolfrom and A. Thompson in Methods in Carbohydrate Chemistry (R. L. Whistler, M. L. Wolfrom and J. N. BeMiller, Eds.), Academic Press, New York, Vol. II, 53, pp. 211-215, (1963)], the reaction of 150 g (832.5 mmol) of α,β-D-mannopyranose with a mixture that consists of 1500 ml of absolute pyridine and 1500 ml of acetic acid anhydride yields, after working-up, 315 g (96.7%) of the above-mentioned title compound as a crude product in the form of a viscous and colorless oil. By 1H-NMR spectroscopic study of the thus obtained title compound, it was possible to determine the α to β ratio of both anomers at 4:1. Separation of α,β-anomers of the above-mentioned title compound can be eliminated to perform the subsequent reaction step. yields

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Man adds triethylamine (5.68 ml) to a stirred suspension of p-nitrobenzyl α-[3-benzyl-7-oxo-4-thia-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl]-α-(1-hydroxyethylidene)acetate (9.06 g) in tetrahydrofuran (120 ml) under nitrogen atmosphere at -20° C. to give clear solution, adds methanesulfonyl chloride (1.65 ml) to the solution, stirs for 30 minutes at the same temperature, adds morpholine (1.92 ml), warms to 0° C., stirs for 5 hours, cools to -30° C. to -35° C., adds pyridine (1.54 ml) and bromine (3.12 g), stirs for 20 minutes, warms to ice-water temperatur, adds 5% hydrochloric acid (144 ml) and methanol (120 ml), stirs for 3 hours at room temperature, and lefts stand overnight at 0° C. Collection of the separated crystals in the reaction mixture by filtration gives p-nitrobenzyl 7-phenylacetamido-3-hydroxy-3-cephem-4-carboxylate (6.678 g). m.p. 201° C. Yield: 71%. to give clear solution warms to 0° C. stirs for 20 minutes stirs for 3 hours at room temperature lefts stand overnight at 0° C Collection of the separated crystals in the reaction mixture by filtration