Hydrochloric Acid → N-(2-chlorophenyl)-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepin-2-carboxamide

HRID 84467

Reaction equation

C([Li])CCC.Br[C:7]1[S:20][C:10]2[C:11]3[CH:19]=[N:18][CH:17]=[CH:16][C:12]=3[O:13][CH2:14][CH2:15][C:9]=2[CH:8]=1.[Cl:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=1[N:28]=[C:29]=[O:30].Cl.C([O-])(O)=O.[Na+]>CCCCCC.O1CCCC1>[Cl:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=1[NH:28][C:29]([C:7]1[S:20][C:10]2[C:11]3[CH:19]=[N:18][CH:17]=[CH:16][C:12]=3[O:13][CH2:14][CH2:15][C:9]=2[CH:8]=1)=[O:30]

Participants

Conditions

Temperature: -78 °C

Procedure

1.6 M of n-Butyllithium in hexane (0.6302 mL) was added dropwise to a solution of 2-bromo-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepine (0.227 g, 0.804 mmol) in tetrahydrofuran (6.00 mL, 74.0 mmol) at −75° C. The dark brown mixture was stirred at −78° C. for 20 min. 1-Chloro-2-isocyanato-benzene (0.1421 g, 0.9252 mmol) in 2 ml of tetrahydrofuran was added dropwise and the mixture was kept at −78° C. for 20 min. 4N aq. HCl (1 ml) was added and the mixture was poured into 50 ml of sat. aq NaHCO3. The mixture was extracted twice with methylene chloride, combined, and washed with water and brine, and dried over MgSO4. After concentrating under vacuum, the residue was triturated with ethyl acetate. The collected precipitate was N-(2-chlorophenyl)-4,5-dihydropyrido[4,3-b]thieno[2,3-d]oxepin-2-carboxamide (0.19 g, 66% yield). MS (ESI+) 357.0.

Workup

waitthe mixture was kept at −78° C. for 20 min
extractionThe mixture was extracted twice with methylene chloride
washwashed with water and brine
dry with materialdried over MgSO4
concentrationAfter concentrating under vacuum
customthe residue was triturated with ethyl acetate

Sources & evidence

ORD record: ord-3cf032983782437b91bd33540e20162c
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846762B2

Linked notes

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