1,2-Dichloroethane → 3,5-dichloro-4-((S)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((S)-3-(3-formylbenzoyl)thiazolidine-2-carbonyloxy)ethyl)pyridine 1-oxide

HRID 1754311Notes

Reaction equation

HRID 1754311 reaction equation
[Cl:1][C:2]1[CH:3]=[N+:4]([O-:34])[CH:5]=[C:6]([Cl:33])[C:7]=1[CH2:8][C@@H:9]([C:18]1[CH:23]=[CH:22][C:21]([O:24][CH:25]([F:27])[F:26])=[C:20]([O:28][CH2:29][CH:30]2[CH2:32][CH2:31]2)[CH:19]=1)[O:10][C:11]([C@H:13]1[NH:17][CH2:16][CH2:15][S:14]1)=[O:12].[CH:35]([C:37]1[CH:38]=[C:39]([CH:43]=[CH:44][CH:45]=1)[C:40](O)=[O:41])=[O:36].C(Cl)CCl>CN(C1C=CN=CC=1)C.CN(C=O)C.Cl>[Cl:1][C:2]1[CH:3]=[N+:4]([O-:34])[CH:5]=[C:6]([Cl:33])[C:7]=1[CH2:8][C@@H:9]([C:18]1[CH:23]=[CH:22][C:21]([O:24][CH:25]([F:27])[F:26])=[C:20]([O:28][CH2:29][CH:30]2[CH2:32][CH2:31]2)[CH:19]=1)[O:10][C:11]([C@H:13]1[N:17]([C:40](=[O:41])[C:39]2[CH:43]=[CH:44][CH:45]=[C:37]([CH:35]=[O:36])[CH:38]=2)[CH2:16][CH2:15][S:14]1)=[O:12]

Participants

7

Reactant 3

HCID 111,2-DichloroethaneHCID 120773-CarboxybenzaldehydeHCID 710925213,5-dichloro-4-((S)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((S)-thiazolidine-2-carbonyloxy)ethyl)pyridine 1-oxide

Product 1

HCID 867202713,5-dichloro-4-((S)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((S)-3-(3-formylbenzoyl)thiazolidine-2-carbonyloxy)ethyl)pyridine 1-oxideYield 41.6%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 313Hydrochloric AcidSolventHCID 6228DimethylformamideSolvent

Procedure

3,5-dichloro-4-((S)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((S)-thiazolidine-2-carbonyloxy)ethyl)pyridine 1-oxide (Int 4, 208 mg, 0.389 mmol), 3-formylbenzoic acid (87 mg, 0.583 mmol), EDC (149 mg, 0.777 mmol), and DMAP (57.0 mg, 0.466 mmol) were dissolved in DMF (2 ml). The reaction was stirred at RT for 8 hours to achieve completion. The reaction mixture was diluted with HCl 1N, and the precipitate was filtered, washed with HCl 1N, dissolved in DCM and extracted with HCl 1N, Na2CO3 sat and brine. The organic phase was dried over Na2SO4 and concentrated under vacuum to give 3,5-dichloro-4-((S)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((S)-3-(3-formylbenzoyl)thiazolidine-2-carbonyloxy)ethyl)pyridine 1-oxide (108 mg, 0.162 mmol, 41.6% yield). The compound was used in the next step without any further purification.

Workup

  1. filtrationthe precipitate was filtered
  2. washwashed with HCl 1N
  3. dissolutiondissolved in DCM
  4. extractionextracted with HCl 1N, Na2CO3
  5. dry with materialThe organic phase was dried over Na2SO4
  6. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-2bda27c8398448e7b92a363a028c282e
Source dataset
uspto-grants-2015_10
Patent number
US09169245B2

Reaction notes

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