Pyridine-2-carbonitrile → HCID 178437217, compound

HRID 503767Notes

Reaction equation

HRID 503767 reaction equation
[NH:1]([C:3]([CH:5]1[CH2:10][CH2:9][N:8]([C:11](OC(C)(C)C)=O)[CH2:7][CH2:6]1)=O)[NH2:2].[N:18]1[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=1[C:24]#[N:25].[CH2:26]([C:28]1[CH:29]=[N:30][N:31]2[CH:36]=[C:35]([C:37]3[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=3)[C:34]([C:43]3[CH:50]=[CH:49][C:46](C=O)=[CH:45][CH:44]=3)=[N:33][C:32]=12)[CH3:27].[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>CO.CN(C=O)C.C(O)(=O)C.C(N(CC)CC)C>[CH2:26]([C:28]1[CH:29]=[N:30][N:31]2[CH:36]=[C:35]([C:37]3[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=3)[C:34]([C:43]3[CH:50]=[CH:49][C:46]([CH2:11][N:8]4[CH2:7][CH2:6][CH:5]([C:3]5[N:25]=[C:24]([C:19]6[CH:20]=[CH:21][CH:22]=[CH:23][N:18]=6)[NH:2][N:1]=5)[CH2:10][CH2:9]4)=[CH:45][CH:44]=3)=[N:33][C:32]=12)[CH3:27]

Participants

9

Reactant 4

HCID 7522Pyridine-2-carbonitrileHCID 5049666Sodium triacetoxyborohydride2×HCID 22713165tert-Butyl 4-(hydrazinecarbonyl)piperidine-1-carboxylateHCID 86630679HCID 86630679, compound

Product 1

HCID 178437217HCID 178437217, compound

Reagents, catalysts & solvents 4

HCID 176Acetic AcidSolventHCID 887MethanolSolventHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Procedure

0.19 ml triethylamine is added to a solution of 0.22 g 2-(5-piperidin-4H[1,2,4]triazol-3-yl)-pyridine*2HCl (prepared from tert-butyl 4-(hydrazinocarbonyl)piperidine-1-carboxylate and pyridine-2-carbonitrile according to a procedure described in U.S. Pat. No. 4,011,218 or WO2005100344) in 5 ml methanol. To this solution a solution of 0.20 g 4-(3-Ethyl-6-phenylpyrazolo[1,5-a]pyrimidin-5-yl)benzaldehyde in 5 ml DMF is added, followed by 0.09 ml glacial acetic acid and 0.26 g NaBH(OAc)3. The resulting mixture is stirred at room temperature. Additional portions of 2 equivalents NaBH(OAc)3 is added after 1, 2, 3, 5 and 8 hours. The solvent is removed by evaporation after 9 h and the residue is purified by chromatography on silica gel (dichloromethane/methanol) to yield the desired compound.

Workup

  1. customThe solvent is removed by evaporation after 9 h
  2. customthe residue is purified by chromatography on silica gel (dichloromethane/methanol)

Sources & evidence

ORD record
ord-8e637e96efc54254a8555753790b3c9f
Source dataset
uspto-grants-2010_08
Patent number
US07776864B2

Reaction notes

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