Cyclobutanone → N-[4-(6-Cyclobutyl-5,6,7,8-tetrahydropyrazolo[3,4-d]azepin-2(4H)-yl)phenyl]methanesulfonamide

HRID 1364158Notes

Reaction equation

HRID 1364158 reaction equation
[N:1]1[N:2]([C:11]2[CH:16]=[CH:15][C:14]([NH:17][S:18]([CH3:21])(=[O:20])=[O:19])=[CH:13][CH:12]=2)[CH:3]=[C:4]2[CH2:10][CH2:9][NH:8][CH2:7][CH2:6][C:5]=12.[C:22]1(=O)[CH2:25][CH2:24][CH2:23]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl.C(O)(=O)C.CO>[CH:22]1([N:8]2[CH2:9][CH2:10][C:4]3=[CH:3][N:2]([C:11]4[CH:12]=[CH:13][C:14]([NH:17][S:18]([CH3:21])(=[O:20])=[O:19])=[CH:15][CH:16]=4)[N:1]=[C:5]3[CH2:6][CH2:7]2)[CH2:25][CH2:24][CH2:23]1

Participants

7

Reactant 3

HCID 14496CyclobutanoneHCID 5049666Sodium triacetoxyborohydrideHCID 66930788N-[4-(5,6,7,8-Tetrahydropyrazolo[3,4-d]azepin-2(4H)-yl)phenyl]methanesulfonamide

Product 1

HCID 16048838N-[4-(6-Cyclobutyl-5,6,7,8-tetrahydropyrazolo[3,4-d]azepin-2(4H)-yl)phenyl]methanesulfonamide

Reagents, catalysts & solvents 3

HCID 176Acetic AcidCatalystHCID 887MethanolSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of N-[4-(5,6,7,8-tetrahydropyrazolo[3,4-d]azepin-2(4H)-yl)phenyl]methanesulfonamide (may be prepared as described in Description 40) (12 mg, 0.04 mmol) in dichloromethane (2 ml) was added cyclobutanone (14 mg, 0.20 mmol) and acetic acid (1 drop). The resulting mixture was stirred at room temperature, under argon, for 30 minutes. Sodium triacetoxyborohydride (42 mg, 0.20 mmol) was added and stirring continued for 1 hour. The resulting reaction mixture was diluted with methanol and purified by SCX, eluting with methanol and then with 2M ammonia/methanol. The basic fractions were combined and solvent evaporated in vacuo to afford the title compound (E29). MS (ES+) m/e 361 [M+H]+.

Workup

  1. stirringstirring
  2. waitcontinued for 1 hour
  3. customThe resulting reaction mixture
  4. custompurified by SCX
  5. washeluting with methanol
  6. customsolvent evaporated in vacuo

Sources & evidence

ORD record
ord-ff5ce00152b848a2995532c4443a91cf
Source dataset
uspto-grants-2011_02
Patent number
US07888347B2

Reaction notes

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