1,2-Dichloroethane → 4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide

HRID 2301722Notes

Reaction equation

HRID 2301722 reaction equation
[O:1]1[CH:5]=[CH:4][C:3]([C:6]2[CH:30]=[CH:29][C:9]([O:10][C:11]3[CH:16]=[CH:15][C:14]([S:17]([CH:20]4[CH:25]([C:26]([OH:28])=O)[NH:24][CH2:23][CH2:22][S:21]4)(=[O:19])=[O:18])=[CH:13][CH:12]=3)=[CH:8][CH:7]=2)=[CH:2]1.[Si](O[NH2:49])(C(C)(C)C)(C1C=CC=CC=1)C1C=CC=CC=1.C(Cl)CCl>ClCCl>[O:1]1[CH:5]=[CH:4][C:3]([C:6]2[CH:30]=[CH:29][C:9]([O:10][C:11]3[CH:12]=[CH:13][C:14]([S:17]([CH:20]4[CH:25]([C:26]([NH2:49])=[O:28])[NH:24][CH2:23][CH2:22][S:21]4)(=[O:18])=[O:19])=[CH:15][CH:16]=3)=[CH:8][CH:7]=2)=[CH:2]1

Participants

5

Reactant 3

HCID 111,2-DichloroethaneHCID 11737343O-(tert-Butyldiphenylsilyl)hydroxylamineHCID 865886704-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid

Product 1

HCID 865886724-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamideYield 14.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 3(S)-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid (293 mg, 0.62 mmol) and O-(tert-butyldiphenylsilyl)hydroxylamine (0.22 g, 0.8 mmol) in 5 mL of dichloromethane was added EDC (132 mg, 0.69 mmol). After 18 hours at 25° C., the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane. The aqueous layer was extracted twice with dichloromethane, and the combined organic layers were washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient from dichloromethane to 5% methanol in dichloromethane, to provide 3(S)-N-(tert-butyldiphenylsilyl)oxy-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide (40 mg, 8%). FAB+MS Calcd for M+Cs+=859.1308 Obs 859.1274; 1HNMR (d6-DMSO): δ 10.81 (s, 1H), 8.17 (s, 1H), 7.74 (s, 1H), 7.67-7.61 (m, 8H), 7.45-7.30 (m, 6H), 7.10 (d, 2H, J=8.83 Hz), 7.00 (d, 2H, J=8.46 Hz), 6.94 (s, 1H), 4.06 (s, 1H), 3.95-3.89 (bm, 1H), 3.77-3.73 (bm, 1H), 2.87-2.78 (bm, 1H), 1.28 (s, 3H), 0.99 (s, 9H), 0.61 (s, 3H).

Workup

  1. customthe mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane
  2. extractionThe aqueous layer was extracted twice with dichloromethane
  3. washthe combined organic layers were washed with brine
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by chromatography on silica gel
  7. washeluting with a gradient from dichloromethane to 5% methanol in dichloromethane

Sources & evidence

ORD record
ord-08aa6bf32fc24f109ad6045c698041f6
Source dataset
uspto-grants-2002_12
Patent number
US06500948B1

Reaction notes

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