huagongshe.com
HRID2184650

反应详情

EQUATION

反应方程式

HRID 2184650 的结构方程式

REACTANTS

反应物

3
结构：OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@H]1O
HCID439357

alpha-​D-​Galactopyranose

C6H12O6

结构：O=[N+]([O-])c1ccc(O[C@H]2O[C@H](CO)[C@H](O)[C@H](O[C@@H]3O[C@H](CO)[C@H](O)[C@H](O)[C@H]3O)[C@H]2O)cc1
HCID69753196

未命名化合物

结构：Nc1ccc(O[C@H]2O[C@H](CO)[C@H](O)[C@H](O[C@@H]3O[C@H](CO)[C@H](O)[C@H](O)[C@H]3O)[C@H]2O)cc1
HCID69753278

未命名化合物

PRODUCTS

生成物

1
结构：O=[N+]([O-])c1ccc(O[C@H]2O[C@H](CO)[C@H](O)[C@H](O[C@H]3O[C@H](CO)[C@H](O)[C@H](O)[C@H]3O)[C@H]2O)cc1
HCID11454026

未命名化合物

AUXILIARIES

试剂、催化剂与溶剂

2
结构：[Pd]
催化剂HCID23938

Palladium

Pd

结构：CO
溶剂HCID887

Methanol

CH4O

PROCEDURE

实验过程

A reaction scheme illustrating the chemoenzymatic synthesis of the αGal epitope, p-aminophenyl 3-O-β-D-galactopyranosyl-α-D-galactopyranoside (22) is shown in FIG. 3. p-Nitrophenyl 3-O-α-D-galactopyranosyl-α-D-galactopyranoside (compound 21) was prepared enzymatically as described by Nilsson (Tetrahedron Lett. (1997) 38:133-136). A mixture of p-nitrophenyl 3-O-β-galactopyranosyl-α-D-galactopyranoside (70 mg, 0.15 mmol) and 10 mg Pd/C (10%) in methanol (4 mL) was stirred under hydrogen at room temperature overnight. The reaction mixture was then filtered through Celite and the filtrate was concentrated in vacuo to give (50 mg) as a yellowish solid: 1H NMR (CD3OD): δ 6.87 (t, 2 H), 6.57 (d, 2 H), 5.21 (d, 1 H), 4.98 (d, 1 H), 4.2-4.1 (m, 2 H), 4.1-3.8 (m, 3 H), 3.8-3.7 (m, 3 H), 3.7-3.5 (m,4 H); 13C NMR (CD3OD): δ 143.8, 120.1, 117.9, 115.4, 101.2, 97.6, 78.3, 77.0, 72.6, 71.5, 71.4, 70.3, 68.7, 67.4, 63.2, 62.6; MS (ESI): m/e (M+Na+) Calcd. for C18H27NO11Na: 456.2, obsd: 456.2.

WORKUP

后处理

  1. customA reaction scheme
  2. filtrationThe reaction mixture was then filtered through Celite
  3. concentrationthe filtrate was concentrated in vacuo
  4. customto give (50 mg) as a yellowish solid