4-Methylmorpholine → tert-butyl (4S,7S,10aS)-7-carbamoyl-5-oxooctahydro-2H-pyrido[2,1-b][1,3]thiazepin-4-ylcarbamate

HRID 529484Notes

Reaction equation

HRID 529484 reaction equation
ClC(OCC(C)C)=O.[C:9]([O:13][C:14]([NH:16][C@H:17]1[CH2:23][CH2:22][S:21][C@H:20]2[CH2:24][CH2:25][CH2:26][C@@H:27]([C:28]([OH:30])=O)[N:19]2[C:18]1=[O:31])=[O:15])([CH3:12])([CH3:11])[CH3:10].C[N:33]1CCOCC1.[NH4+].[OH-]>C(Cl)Cl>[C:28]([C@H:27]1[N:19]2[C@@H:20]([S:21][CH2:22][CH2:23][C@H:17]([NH:16][C:14](=[O:15])[O:13][C:9]([CH3:11])([CH3:10])[CH3:12])[C:18]2=[O:31])[CH2:24][CH2:25][CH2:26]1)(=[O:30])[NH2:33]

Participants

6

Reactant 4

HCID 79724-MethylmorpholineHCID 14923Ammonium HydroxideHCID 62365Isobutyl chloroformateHCID 68292173(4S,7S,10aS)-4-(tert-butoxycarbonylamino)-5-oxooctahydro-2H-pyrido[2,1-b][1,3]thiazepine-7-carboxylic acid

Product 1

HCID 68311221tert-butyl (4S,7S,10aS)-7-carbamoyl-5-oxooctahydro-2H-pyrido[2,1-b][1,3]thiazepin-4-ylcarbamateYield 90.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

Isobutyl chloroformate (31.2 mg, 0.229 mmol) was added to a solution of (4S,7S,10aS)-4-(tert-Butoxycarbonylamino)-5-oxooctahydro-2H-pyrido[2,1-b][1,3]thiazepine-7-carboxylic acid (75 mg, 0.22 mmol) and 4-methylmorpholine (26.4 mg, 0.261 mmol) in DCM at 0° C. After stirring for 30 min at 0° C., NH4OH was added. The ice bath was removed and the reaction mixture was stirred at rt for 30 min. The reaction mixture was concentrated and the residue was partitioned between EtOAc and aqueous 0.5 N HCl. The organic phase was isolated, washed with saturated aqueous NaHCO3 and saturated aqueous NaCl, dried over MgSO4, filtered and concentrated to give tert-butyl (4S,7S,10aS)-7-carbamoyl-5-oxooctahydro-2H-pyrido[2,1-b][1,3]thiazepin-4-ylcarbamate (67 mg, 0.20 mmol, 90% yield) as an oil. Anal. Calcd. for C15H25N3O4S m/z 343.4. found: 344.3 (M+H)+.

Workup

  1. customThe ice bath was removed
  2. stirringthe reaction mixture was stirred at rt for 30 min
  3. concentrationThe reaction mixture was concentrated
  4. customthe residue was partitioned between EtOAc and aqueous 0.5 N HCl
  5. customThe organic phase was isolated
  6. washwashed with saturated aqueous NaHCO3 and saturated aqueous NaCl
  7. dry with materialdried over MgSO4
  8. filtrationfiltered
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-c46ac038bc664915900f0838e807ddd1
Source dataset
uspto-grants-2016_05
Patent number
US09346852B2

Reaction notes

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