Lithium hydride → racemic (2'R,3R,4'S)-6-chloro-4'-(3-chloro-phenyl)-1'-(3-chloro-propyl)-2'-isopropenyl-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine] 1-methoxyethyl trimethylsilane

Participants

Reaction Steps

In a manner similar to the method described in example 24c, racemic (2′R,3R,4′S)-6-chloro-4′-(3-chloro-phenyl)-2′-isopropenyl-2,3-dihydro-2,6′-dioxospiro[indole-3,3′-piperidine]-1-methoxyethyl trimethylsilane (1.57 g, 2.95 mmol) prepared in example 116a was reacted with LiH (2.3 g, 29.5 mmol) and 1-chloro-3-iodo-propane (6.04 g, 29.5 mmol) in N,N-dimethyl-formamide (100 mL) to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chloro-phenyl)-1′-(3-chloro-propyl)-2′-isopropenyl-2,3-dihydro-2,6′-dioxospiro[indole-3,3′-piperidine]-1-methoxyethyl trimethylsilane as a white form (Yield: 0.6 g, 33.5%).

Provenance & Evidence