Triethylamine → (RS,SR)-2-(benzenesulfonyl-fluoro-methylcarbamoyl-methyl)-6-chloro-1,2,3,4-tetrahydro-carbazole-9-carboxylic acid tert-butyl ester

HRID 602763Notes

Reaction equation

HRID 602763 reaction equation
[C:1]1([S:7]([C:10]([CH:16]2[CH2:28][CH2:27][C:26]3[C:25]4[C:20](=[CH:21][CH:22]=[C:23]([Cl:29])[CH:24]=4)[NH:19][C:18]=3[CH2:17]2)([F:15])[C:11]([NH:13][CH3:14])=[O:12])(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CCN(CC)CC.[C:37]([O:41][C:42](=O)[O:43]C(C)(C)C)([CH3:40])([CH3:39])[CH3:38]>C(Cl)Cl.CN(C1C=CN=CC=1)C>[C:37]([O:41][C:42]([N:19]1[C:18]2[CH2:17][CH:16]([C:10]([S:7]([C:1]3[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=3)(=[O:8])=[O:9])([F:15])[C:11](=[O:12])[NH:13][CH3:14])[CH2:28][CH2:27][C:26]=2[C:25]2[C:20]1=[CH:21][CH:22]=[C:23]([Cl:29])[CH:24]=2)=[O:43])([CH3:40])([CH3:39])[CH3:38]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 10219638Carbonic acid, bis(1,1-dimethylethyl) esterHCID 11270482(RS,SR)-2-benzenesulfonyl-2-(6-chloro-2,3,4,9-tetrahydro-1H-carbazol-2-yl)-2-fluoro-N-methyl-acetamide

Product 1

HCID 67267476(RS,SR)-2-(benzenesulfonyl-fluoro-methylcarbamoyl-methyl)-6-chloro-1,2,3,4-tetrahydro-carbazole-9-carboxylic acid tert-butyl esterYield 59%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To 950 mg (2.18 mmol) of (RS,SR)-2-benzenesulfonyl-2-(6-chloro-2,3,4,9-tetrahydro-1H-carbazol-2-yl)-2-fluoro-N-methyl-acetamide (from example 56) in 10 mL of CH2Cl2 at RT were added 0.60 mL (4.36 mmol, 2 eq) of Et3N, 27 mg (0.22 mmol, 0.1 eq) of DMAP and 571 mg (2.62 mmol, 1.2 eq) of carbonic acid di-tert-butyl ester. The reaction mixture was stirred at RT for 2 hours and extracted with 1M HCl. The organic phases were dried over Na2SO4, filtered and evaporated. Column chromatography afforded 682 mg (59%) of (RS,SR)-2-(benzenesulfonyl-fluoro-methylcarbamoyl-methyl)-6-chloro-1,2,3,4-tetrahydro-carbazole-9-carboxylic acid tert-butyl ester as white solid, MS: 552 (MNH4+).

Workup

  1. extractionextracted with 1M HCl
  2. dry with materialThe organic phases were dried over Na2SO4
  3. filtrationfiltered
  4. customevaporated

Sources & evidence

ORD record
ord-aaf90d0481a34a77832188d96588ea4e
Source dataset
uspto-grants-2011_03
Patent number
US07906546B2

Reaction notes

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