alpha-D-Galactopyranose → p-Nitrophenyl 3-O-alpha-D-galactopyranosyl-alpha-D-galactopyranoside

HRID 2184650

反応式

HRID 2184650 の反応式
O[C@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O.[C@@H]1(O[C@H]2[C@@H](O)[C@@H](CO)O[C@H](OC3C=CC(N)=CC=3)[C@@H]2O)O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O.[C@@H:43]1([O:54][C@H:55]2[C@@H:70]([OH:71])[C@@H:69]([CH2:72][OH:73])[O:68][C@H:57]([O:58][C:59]3[CH:64]=[CH:63][C:62]([N+:65]([O-:67])=[O:66])=[CH:61][CH:60]=3)[C@@H:56]2[OH:74])[O:51][C@H:50]([CH2:52][OH:53])[C@H:48]([OH:49])[C@H:46]([OH:47])[C@H:44]1[OH:45]>CO.[Pd]>[C@H:43]1([O:54][C@H:55]2[C@@H:70]([OH:71])[C@@H:69]([CH2:72][OH:73])[O:68][C@H:57]([O:58][C:59]3[CH:64]=[CH:63][C:62]([N+:65]([O-:67])=[O:66])=[CH:61][CH:60]=3)[C@@H:56]2[OH:74])[O:51][C@H:50]([CH2:52][OH:53])[C@H:48]([OH:49])[C@H:46]([OH:47])[C@H:44]1[OH:45]

参加物

6

反応物 3

HCID 439357alpha-D-GalactopyranoseHCID 69753196p-nitrophenyl 3-O-beta-galactopyranosyl-alpha-D-galactopyranosideHCID 69753278p-aminophenyl 3-O-beta-D-galactopyranosyl-alpha-D-galactopyranoside

生成物 1

HCID 11454026p-Nitrophenyl 3-O-alpha-D-galactopyranosyl-alpha-D-galactopyranoside

試薬・触媒・溶媒 2

HCID 23938Palladium触媒HCID 887Methanol溶媒

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-f7da1507dadb4a6699bb21d707922e8d
出典データセット
uspto-grants-2002_06
特許番号
US06399578B1

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