Pivaloyl chloride → HCID 18376548, compound

HRID 844195Notes

Reaction equation

HRID 844195 reaction equation
[C:1]1([NH:7][C:8](=[O:30])[C:9]2[CH:14]=[C:13]([OH:15])[C:12]([OH:16])=[CH:11][C:10]=2[NH:17][C:18]([C:20]2[S:24][C:23]3[CH:25]=[CH:26][CH:27]=[CH:28][C:22]=3[C:21]=2[Cl:29])=[O:19])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:31][C:32]([CH3:37])([CH3:36])[C:33](Cl)=[O:34]>C(Cl)Cl.N1C=CC=CC=1>[C:1]1([NH:7][C:8](=[O:30])[C:9]2[CH:14]=[C:13]([OH:15])[C:12]([O:16][C:33]([C:32]([CH3:37])([CH3:36])[CH3:31])=[O:34])=[CH:11][C:10]=2[NH:17][C:18]([C:20]2[S:24][C:23]3[CH:25]=[CH:26][CH:27]=[CH:28][C:22]=3[C:21]=2[Cl:29])=[O:19])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

5

Reactant 2

HCID 62493Pivaloyl chlorideHCID 18377030HCID 18377030, compound

Product 1

HCID 18376548HCID 18376548, compoundYield 40%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of N-phenyl-2-[((3-chlorobenzo(b]thien-2-yl)carbonyl)amino]-4,5-dihydroxybenzamide (0.09 g, 0.21 mmol) in CH2Cl2 (1 mL) and pyridine (1 mL) at 0° C. was added trimethylacetyl chloride (0.027 mL, 0.22 mmol). The solution was allowed to warm to ambient temperature with stirring. After 16 hours, the reaction mixture was partitioned between ethyl acetate and dilute HCl. The organic layer was dried over Na2SO4 and concentrated in vacuo. The resulting oil was purified by flash chromatography on silica gel to afford 0.038 g (40% yield) of N-phenyl-2-[((3-chlorobenzo[b]thien-2-yl)carbonyl)amino]-5-hydroxy4-((1,1-dimethylethyl)carbonyl)oxybenzamide as a white solid; NMR(DMSO-d6) 12.2 (s, 1), 10.8 (s, 1), 10.4 (s, 1), 8.3 (s, 1), 8.2 (d, 1), 8.0 (d, 1), 7.6-7.7 (m, 4), 7.4 (t, 1), 1.3 (s, 9) ppm.

Workup

  1. customthe reaction mixture was partitioned between ethyl acetate and dilute HCl
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated in vacuo
  4. customThe resulting oil was purified by flash chromatography on silica gel

Sources & evidence

ORD record
ord-8a6cfc5624f84110827a19b54655aa6d
Source dataset
uspto-grants-2002_04
Patent number
US06380221B1

Reaction notes

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