Acetic Anhydride → Ethyl 2-(6-(5-acetamido-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate

HRID 1798299Notes

Reaction equation

HRID 1798299 reaction equation
[NH2:1][C:2]1[S:6][C:5]([O:7][C:8]2[CH:9]=[C:10]([CH3:24])[C:11]3[CH:15]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])[O:14][B:13]([OH:22])[C:12]=3[CH:23]=2)=[N:4][N:3]=1.CCN(CC)CC.[C:32](OC(=O)C)(=[O:34])[CH3:33]>C(Cl)Cl>[C:32]([NH:1][C:2]1[S:6][C:5]([O:7][C:8]2[CH:9]=[C:10]([CH3:24])[C:11]3[CH:15]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])[O:14][B:13]([OH:22])[C:12]=3[CH:23]=2)=[N:4][N:3]=1)(=[O:34])[CH3:33]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 58292641Ethyl 2-(6-(5-amino-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate

Product 1

HCID 58292750Ethyl 2-(6-(5-acetamido-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of ethyl 2-(6-(5-amino-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate (70 mg, 0.2 mmol) in DCM (10 mL) was added Et3N (0.11 ml) and acetic anhydride (0.08 mL). The mixture was stirred at room overnight. The mixture was concentrated and precipitate was filtered and washed with a mixture of hexane and ethyl acetate to afford the product as a light yellow solid (59 mg). 1H NMR (DMSO-d6) δ 12.44 (s, 1H), 9.28 (s, 1H), 7.4 (s, 1H), 7.26 (s, 1H), 5.54 (d, 1H), 4.03 (q, H) 3.14 (dd, 1H), 2.48 (d, 1H), 2.35 (s, 3H), 2.13 (s, 3H), 1.11 (t, 3H); MS found: (M+H)+=392.1.

Workup

  1. concentrationThe mixture was concentrated
  2. filtrationprecipitate was filtered
  3. washwashed with a mixture of hexane and ethyl acetate

Sources & evidence

ORD record
ord-160f5a14f9cb4a60afd34b8d103768bc
Source dataset
uspto-grants-2013_01
Patent number
US08343944B2

Reaction notes

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