Phenol → HCID 12290038, compound
Reaction equation
F[C:2]1[C:3]([N+:9]([O-:11])=[O:10])=[C:4]([CH3:8])[CH:5]=[CH:6][CH:7]=1.[C:12]1([OH:18])[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(=O)([O-])[O-].[K+].[K+]>>[O:18]([C:2]1[C:3]([N+:9]([O-:11])=[O:10])=[C:4]([CH3:8])[CH:5]=[CH:6][CH:7]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1Participants
Procedure
In Scheme I, fluoronitrotoluene a is reacted with phenol b in the presence of mild base such as potassium carbonate, to afford a phenoxy nitrotoluene c. Phenoxy nitrotoluene c is then reduced, using catalyzed hyrdogenation or othe reduction technique, to provide phenoxy aminotoluene d. Phenoxy aminotoluene d undergoes a cyclization reaction by treatment with isoamyl nitrate to form phenoxy indazole e. Phenoxy indazole e is subject to iodine under basic conditions to yield a phenoxy iodoindazine f, which is then protected via Boc, Fmoc or other suitable protection scheme, to afford a protected phenoxy iodoindazole g. The protected phenoxy iodoindazole g is treated with a phenyl boronic acid h in the presence of a suitable catalyst to form a phenoxy phenylindazole i, which is deprotected to provide an indazole derivative j in accordance with the invention.
Sources & evidence
- ORD record
- ord-12b14f5b612f4fe68e086631dd8ada91
- Source dataset
- uspto-grants-2009_02
- Patent number
- US07495015B2
Reaction notes
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