N,N,N',N'-Tetramethylazodicarboxamide → [Rac]-3-{4-[2-(2,4-dichloro-phenyl)-4-methyl-thiazol-5-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid ethyl ester

Participants

Reaction Steps

In analogy to the procedure described in example 10 c], [rac]-2-ethoxy-3-(4-hydroxy-2-methyl-phenyl)-propionic acid ethyl ester (example 10 b]) was reacted with 2-(2,4-dichloro-phenyl)-5-methoxymethyl-4-methyl-thiazole (prepared from 2,4-dichloro-thiobenzamide and ethyl 2-chloro-acetoacetate in analogy to the procedures described in examples 33 a] and 33 b]) in the presence of tributylphosphine and N,N,N′,N′-tetramethyl azodicarboxamide to yield [rac]-3-{4-[2-(2,4-dichloro-phenyl)-4-methyl-thiazol-5-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid ethyl ester as colorless liquid.

Provenance & Evidence