Ammonium Chloride → HCID 3011897, compound
Reaction equation
C([NH:4][C:5]1[C:6]2[C:13](Br)=[CH:12][N:11]([C@@H:15]3[O:27][C@H:26]([CH2:28][O:29]C(=O)C)[C@@H:21]([O:22]C(=O)C)[C@@:16]3([CH3:33])[O:17]C(=O)C)[C:7]=2[N:8]=[CH:9][N:10]=1)(=O)C.C([Li])CCC.C1C=CC(S(N(S(C2C=CC=CC=2)(=O)=O)[F:49])(=O)=O)=CC=1.[Cl-].[NH4+]>C1COCC1.ClCCl>[NH2:4][C:5]1[C:6]2[C:13]([F:49])=[CH:12][N:11]([C@@H:15]3[O:27][C@H:26]([CH2:28][OH:29])[C@@H:21]([OH:22])[C@@:16]3([CH3:33])[OH:17])[C:7]=2[N:8]=[CH:9][N:10]=1Participants
Conditions
- Temperature
- -78 °C
Procedure
To a pre-cooled (−78° C.) solution of the compound from Step B (529 mg, 1.00 mmol) in THF is added butyl lithium (2M in hexanes) (0.5 mL, 1.00 mmol). The resulting solution is stirred at −78° C. for 30 min and then quenched with N-fluorobenzensulfonimide (315 mg, 1.00 mmol) in THF. The resulting solution is very slowly allowed to come to ambient temperature and then poured into a stirred mixture of saturated aqueous ammonium chloride and dichloromethane. The organic phase is evaporated in vacuo and treated with ammonium hydroxide at 55° C. in a closed container overnight. The resulting crude mixture is purified on silica gel using dichloromethane/methanol as the eluent. Fractions containing the desired product are pooled and evaporated in vacuo to give the desired product.
Workup
- customto come to ambient temperature
- customThe organic phase is evaporated in vacuo
- additiontreated with ammonium hydroxide at 55° C. in a closed container overnight
- customThe resulting crude mixture is purified on silica gel
- additionFractions containing the desired product
- customevaporated in vacuo
Sources & evidence
- ORD record
- ord-cbd17ef1941d4abe9d62d1cb34c887fd
- Source dataset
- uspto-grants-2007_04
- Patent number
- US07202224B2
Reaction notes
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