(5R,9R)-tert-butyl 9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate → (5R,9R)-9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylic acid

HRID 2204976Notes

Reaction equation

HRID 2204976 reaction equation
[C:1]([NH:14][C@H:15]([CH2:45][O:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][CH2:61][CH3:62])[CH2:16][S:17][CH2:18][C@@H:19]([C:38]([O:40]C(C)(C)C)=[O:39])[NH:20][C:21](=[O:37])[O:22][CH2:23][CH:24]1[C:36]2[CH:35]=[CH:34][CH:33]=[CH:32][C:31]=2[C:30]2[C:25]1=[CH:26][CH:27]=[CH:28][CH:29]=2)(=[O:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]>C(O)(C(F)(F)F)=O.C(Cl)Cl.CC(OC)(C)C>[C:1]([NH:14][C@H:15]([CH2:45][O:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][CH2:61][CH3:62])[CH2:16][S:17][CH2:18][C@@H:19]([C:38]([OH:40])=[O:39])[NH:20][C:21](=[O:37])[O:22][CH2:23][CH:24]1[C:25]2[CH:26]=[CH:27][CH:28]=[CH:29][C:30]=2[C:31]2[C:36]1=[CH:35][CH:34]=[CH:33][CH:32]=2)(=[O:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]

Participants

5

Reactant 1

HCID 71294491(5R,9R)-tert-butyl 9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate

Product 1

HCID 71294499(5R,9R)-9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylic acid

Reagents, catalysts & solvents 3

HCID 6344DichloromethaneSolventHCID 6422Trifluoroacetic acidSolventHCID 15413tert-Butyl methyl etherSolvent

Procedure

A solution of (5R,9R)-tert-butyl 9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylate in 40% TFA in DCM (0.3 M) was stirred at room temperature until complete deprotection of tert-butyl group (2 hours). The reaction mixture was diluted in MTBE, washed three times with 1 M citric acid (pH 3), and once with 1:2 HCl (3 M)/brine. The organic layer was dried over anhydrous Na2SO4 and concentrated en vaccuo to give (5R,9R)-9-dodecanamido-1-(9H-fluoren-9-yl)-3-oxo-2,11-dioxa-7-thia-4-azaheptacosane-5-carboxylic acid.

Workup

  1. washwashed three times with 1 M citric acid (pH 3)
  2. dry with materialThe organic layer was dried over anhydrous Na2SO4
  3. concentrationconcentrated en vaccuo

Sources & evidence

ORD record
ord-d2a2e20fc8d94bb788326bdce69b21f1
Source dataset
uspto-grants-2016_06
Patent number
US09365506B2

Reaction notes

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