Diphenylphosphinic chloride → rac-(2'S,3'R,4'S,5'R)-6-chloro-4'-(3-chloro-2-fluoro-phenyl)-2'-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3'-pyrrolidine]-5'-carboxylic acid {1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-1,2-dihydro-pyridin-4-yl}-amide

Beteiligte Stoffe

Reaktionsschritte

In a manner similar to the method described in Example 27, rac-(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carboxylic acid trifluoroacetic acid prepared in Example 4 (0.5 g, 0.86 mmol), was reacted with diisopropylethylamine (0.89 g, 6.9 mmol), diphenylphosphinic chloride (0.82 g, 3.5 mmol), then reacted with 4-amino-1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1H-pyridin-2-one (0.23 g, 0.86 mmol) at 60° C. to give rac-(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carboxylic acid {1-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-1,2-dihydro-pyridin-4-yl}-amide as a off white foam (Yield 0.2 g, 32%).

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