trans-7-Chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-crotonic acid → trans-7-Chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-butyric acid

HRID 1788Notes

Reaction equation

HRID 1788 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:11]([CH:12]([CH3:14])[CH3:13])[C:10](=[O:15])[C@@H:9]([CH2:16]/[CH:17]=[CH:18]/[C:19]([OH:21])=[O:20])[O:8][C@H:7]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[Cl:28])[C:6]=2[CH:29]=1.[H][H]>C(OCC)(=O)C.[C].[Pd]>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:11]([CH:12]([CH3:13])[CH3:14])[C:10](=[O:15])[C@@H:9]([CH2:16][CH2:17][CH2:18][C:19]([OH:21])=[O:20])[O:8][C@H:7]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[Cl:28])[C:6]=2[CH:29]=1

Participants

5

Reactant 2

HCID 86752222trans-7-Chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-crotonic acidHCID 178418361HCID 178418361, compound

Product 1

HCID 69946426trans-7-Chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-butyric acidYield 81.8%

Reagents, catalysts & solvents 2

HCID 178418390HCID 178418390, compoundCatalystHCID 8857Ethyl AcetateSolvent

Procedure

In ethyl acetate (20 ml) was dissolved ethyl ester of trans-7-chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-crotonic acid (0.45 g). To the solution was added 10% palladium carbon (0.1 g), and the mixture was subjected to catalytic reduction at room temperatures under atmospheric pressure. The theoretical amount of hydrogen was allowed to be absorbed, then the catalyst was removed, followed by distilling off ethyl acetate under reduced pressure. The residue was crystallized from a small volume of hexane to give ethyl ester of trans-7-chloro-5-(2-chlorophenyl)-1-isopropyl-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepine-3-butyric acid (0.37 g) as prisms, m.p.100°-101° C.

Workup

  1. customto be absorbed
  2. customthe catalyst was removed
  3. distillationby distilling off ethyl acetate under reduced pressure
  4. customThe residue was crystallized from a small volume of hexane

Sources & evidence

ORD record
ord-a2fcb8e364ca4dd2ada72db56fde3611
Source dataset
uspto-grants-1998_03
Patent number
US05726306

Reaction notes

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