Triphenylphosphine → [Rac]-3-{4-[2-(4-chloro-phenyl)-5-methyl-oxazol-4-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid ethyl ester
Reaction equation
[CH2:1]([O:3][C:4](=[O:18])[CH:5]([O:15][CH2:16][CH3:17])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([OH:13])=[CH:9][C:8]=1[CH3:14])[CH3:2].[Cl:19][C:20]1[CH:25]=[CH:24][C:23]([C:26]2[O:27][C:28]([CH3:33])=[C:29]([CH2:31]O)[N:30]=2)=[CH:22][CH:21]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>>[CH2:1]([O:3][C:4](=[O:18])[CH:5]([O:15][CH2:16][CH3:17])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH2:31][C:29]2[N:30]=[C:26]([C:23]3[CH:24]=[CH:25][C:20]([Cl:19])=[CH:21][CH:22]=3)[O:27][C:28]=2[CH3:33])=[CH:9][C:8]=1[CH3:14])[CH3:2]Participants
Reactant 4
Product 1
Procedure
In analogy to the procedure described in example 21 f], [rac]-2-ethoxy-3-(4-hydroxy-2-methyl-phenyl)-propionic acid ethyl ester (example 129 c]) was reacted with [2-(4-chloro-phenyl)-5-methyl-oxazol-4-yl]-methanol (R. C. Self, W. E. Barber, J. P. Machin, J. M. Osbond, C. E. Smithen, B. P. Tong, J. C. Wickens, D. P. Bloxham, D. Bradshaw, C. H. Cashin, B. B. Dodge, E. J. Lewis, D. Westmacott, J. Med. Chem. 1991, 34, 772-777) in the presence of triphenylphosphine and diethyl azodicarboxylate to yield [rac]-3-{4-[2-(4-chloro-phenyl)-5-methyl-oxazol-4-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid ethyl ester, which was further saponified in analogy to the procedure described in example 120 f] to yield [rac]-3-{4-[2-(4-chloro-phenyl)-5-methyl-oxazol-4-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid as colorless solid.
Sources & evidence
- ORD record
- ord-ff59ad447c594e578820049caf564474
- Source dataset
- uspto-grants-2003_11
- Patent number
- US06642389B2
Reaction notes
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