1,8-Diazabicyclo(5.4.0)undec-7-ene → ethyl 3-(cyanomethyl)-3-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]cyclobutanecarboxylate
Reaction equation
[NH:1]1[CH:5]=[C:4]([C:6]2[C:7]3[CH:14]=[CH:13][N:12]([CH2:15][O:16][CH2:17][CH2:18][Si:19]([CH3:22])([CH3:21])[CH3:20])[C:8]=3[N:9]=[CH:10][N:11]=2)[CH:3]=[N:2]1.[C:23]([CH:25]=[C:26]1[CH2:29][CH:28]([C:30]([O:32][CH2:33][CH3:34])=[O:31])[CH2:27]1)#[N:24].N12CCCN=C1CCCCC2>C(#N)C>[C:23]([CH2:25][C:26]1([N:1]2[CH:5]=[C:4]([C:6]3[C:7]4[CH:14]=[CH:13][N:12]([CH2:15][O:16][CH2:17][CH2:18][Si:19]([CH3:22])([CH3:21])[CH3:20])[C:8]=4[N:9]=[CH:10][N:11]=3)[CH:3]=[N:2]2)[CH2:29][CH:28]([C:30]([O:32][CH2:33][CH3:34])=[O:31])[CH2:27]1)#[N:24]Participants
5
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 4-(1H-pyrazol-4-yl)-7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidine (5.23 g, 16.6 mmol) and ethyl 3-(cyanomethylene)cyclobutanecarboxylate (prepared in Step 4) in acetonitrile (40 mL) was added 1,8-diazabicyclo[5.4.0]undec-7-ene (2.48 mL, 16.6 mmol). The mixture was stirred for 136 hours at room temperature. The solvent was removed in vacuo. Flash column chromatography, eluting with a gradient of 50-90% ethyl acetate in hexanes afforded product as a mixture of cis- and trans-isomers (4.53 g, 52% over the two steps).
Workup
- customThe solvent was removed in vacuo
- washFlash column chromatography, eluting with a gradient of 50-90% ethyl acetate in hexanes afforded product as a mixture of cis- and trans-isomers (4.53 g, 52% over the two steps)
Sources & evidence
- ORD record
- ord-71abf6c9df9b4be0917cb1b661659e99
- Source dataset
- uspto-grants-2012_04
- Patent number
- US08158616B2
Reaction notes
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