Triphenylphosphine → [Rac]-3-(4-{2-[2-(4-tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethoxy}-3-methoxy-phenyl)-2-ethoxy-propionic acid ethyl ester

HRID 394300Notes

Reaction equation

HRID 394300 reaction equation
[CH2:1]([O:3][C:4](=[O:19])[CH:5]([O:16][CH2:17][CH3:18])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([OH:13])=[C:9]([O:14][CH3:15])[CH:8]=1)[CH3:2].[C:20]([C:24]1[CH:29]=[CH:28][C:27]([C:30]2[S:31][C:32]([CH3:38])=[C:33]([CH2:35][CH2:36]O)[N:34]=2)=[CH:26][CH:25]=1)([CH3:23])([CH3:22])[CH3:21].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[CH2:1]([O:3][C:4](=[O:19])[CH:5]([O:16][CH2:17][CH3:18])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH2:36][CH2:35][C:33]2[N:34]=[C:30]([C:27]3[CH:26]=[CH:25][C:24]([C:20]([CH3:21])([CH3:23])[CH3:22])=[CH:29][CH:28]=3)[S:31][C:32]=2[CH3:38])=[C:9]([O:14][CH3:15])[CH:8]=1)[CH3:2]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 226475952-[2-(4-Tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethanolHCID 22708420[Rac]-2-ethoxy-3-(4-hydroxy-3-methoxy-phenyl)-propionic acid ethyl ester

Product 1

HCID 68616635[Rac]-3-(4-{2-[2-(4-tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethoxy}-3-methoxy-phenyl)-2-ethoxy-propionic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

In analogy to the procedure described in example 1 d], [rac]-2-ethoxy-3-(4-hydroxy-3-methoxy-phenyl)-propionic acid ethyl ester was reacted with 2-[2-(4-tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethanol (example 12 b]) in tetrahydrofuran in the presence of triphenylphosphine and DEAD (diethyl azodicarboxylate) to yield [rac]-3-(4-{2-[2-(4-tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethoxy}-3-methoxy-phenyl)-2-ethoxy-propionic acid ethyl ester, which was further saponified in analogy to the procedure described in example 4 e], to yield [rac]-3-(4-{2-[2-(4-tert-butyl-phenyl)-5-methyl-thiazol-4-yl]-ethoxy}-3-methoxy-phenyl)-2-ethoxy-propionic acid as light yellow amorphous solid.

Workup

  1. customdescribed in example 1 d

Sources & evidence

ORD record
ord-244431c062f743f5a58c8234f6115400
Source dataset
uspto-grants-2004_10
Patent number
US06809110B2

Reaction notes

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