N,N,N',N'-Tetramethylazodicarboxamide → (S)-3-{4-[2-(2-tert-butyl-5-methyl-oxazol-4-yl)-ethoxy]-2,6-dimethyl-phenyl}-2-ethoxy-propionic acid methyl ester

HRID 2215248Notes

Reaction equation

HRID 2215248 reaction equation
[CH3:1][O:2][C:3](=[O:18])[C@@H:4]([O:15][CH2:16][CH3:17])[CH2:5][C:6]1[C:11]([CH3:12])=[CH:10][C:9]([OH:13])=[CH:8][C:7]=1[CH3:14].[C:19]([C:23]1[O:24][C:25]([CH3:31])=[C:26]([CH2:28][CH2:29]O)[N:27]=1)([CH3:22])([CH3:21])[CH3:20].C(P(CCCC)CCCC)CCC.CN(C)C(N=NC(N(C)C)=O)=O>>[CH3:1][O:2][C:3](=[O:18])[C@@H:4]([O:15][CH2:16][CH3:17])[CH2:5][C:6]1[C:11]([CH3:12])=[CH:10][C:9]([O:13][CH2:29][CH2:28][C:26]2[N:27]=[C:23]([C:19]([CH3:20])([CH3:22])[CH3:21])[O:24][C:25]=2[CH3:31])=[CH:8][C:7]=1[CH3:14]

Participants

5

Reactant 4

HCID 4278N,N,N',N'-TetramethylazodicarboxamideHCID 13831TributylphosphineHCID 115792322-(2-Tert-butyl-5-methyl-oxazol-4-yl)-ethanolHCID 68616541(2S)-2-ethoxy-3-(4-hydroxy-2,6-dimethyl-phenyl)-propionic acid methyl ester

Product 1

HCID 69489846(S)-3-{4-[2-(2-tert-butyl-5-methyl-oxazol-4-yl)-ethoxy]-2,6-dimethyl-phenyl}-2-ethoxy-propionic acid methyl ester

Procedure

In analogy to the Mitsunobu-procedure described in example 1, step f], (2S)-2-ethoxy-3-(4-hydroxy-2,6-dimethyl-phenyl)-propionic acid methyl ester (example 51 e]) was reacted with 2-(2-tert-butyl-5-methyl-oxazol-4-yl)-ethanol (example 1, step e])) in the presence of tributylphosphine and N,N,N′,N′-tetramethyl azodicarboxamide to yield (S)-3-{4-[2-(2-tert-butyl-5-methyl-oxazol-4-yl)-ethoxy]-2,6-dimethyl-phenyl}-2-ethoxy-propionic acid methyl ester as colorless oil.

Sources & evidence

ORD record
ord-b2c2da7764d94b6caf060663b3d35677
Source dataset
uspto-grants-2006_09
Patent number
US07109225B2

Reaction notes

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