Triethylamine → N-((2'-Cyano(1,1'-biphenyl)-4-yl)methyl)-N-(1-oxopentyl)-L-valine methyl ester

HRID 1443313Notes

Reaction equation

HRID 1443313 reaction equation
[CH3:1][CH2:2][CH2:3][CH2:4][C:5]([N:7]([C@H:26]([C:30]([OH:32])=[O:31])[CH:27]([CH3:29])[CH3:28])[CH2:8][C:9]1[CH:10]=[CH:11][C:12]([C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][C:20]=2[C:21]2[NH:22]N=NN=2)=[CH:13][CH:14]=1)=[O:6].[CH3:33]OC(=O)[C@H](C(C)C)NCC1C=CC(C2C=CC=CC=2C#N)=CC=1.C(Cl)(=O)CCCC.C(N(CC)CC)C>ClCCl>[CH3:33][O:32][C:30](=[O:31])[C@H:26]([CH:27]([CH3:28])[CH3:29])[N:7]([CH2:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][C:20]=2[C:21]#[N:22])=[CH:11][CH:10]=1)[C:5](=[O:6])[CH2:4][CH2:3][CH2:2][CH3:1]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 61186Valeryl chlorideHCID 16744794N-((2'-Cyano(1,1'-biphenyl)-4-yl)methyl)-L-valine methyl esterHCID 178447302HCID 178447302, compound

Product 1

HCID 16744795N-((2'-Cyano(1,1'-biphenyl)-4-yl)methyl)-N-(1-oxopentyl)-L-valine methyl ester

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Briefly, the process for the preparation of valsartan comprises of the condensation of N-[(2′-cyanobiphenyl-4-yl)methyl]-(L)-valine methyl ester of Formula II with valeryl chloride of Formula III in the presence of triethylamine and dichloromethane, followed by flash chromatography, to give the compound N-[(2′-cyanobiphenyl-4-yl)methyl]-N-valeryl-(L)-valine methyl ester of Formula IV. The compound of Formula IV on tetrazole formation using tributyltin azide and subsequent hydrolysis using sodium hydroxide, followed by flash chromatography, gives valsartan of Formula I.

Sources & evidence

ORD record
ord-cc81514b625a4b96bffa630fcbe18e96
Source dataset
uspto-grants-2010_02
Patent number
US07659406B2

Reaction notes

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