Triphenylphosphine → 4-{[1-(1-Benzenesulfonyl-pyrrolidin-3-yl)-5-oxo-4,4-bis-pyridin-4-ylmethyl-imidazolidin-2-ylidene]-acetyl}-benzonitrile

Participants

Reaction Steps

Using the same procedure as described in Example 1, 1 -phenylsulfonylpyrrolidin-3-ylisocyanate (1.38 mmol) was used in the place of 3-benzenesulfonyl-6-isothiocyanato-3-aza-bicyclo[3.1.0]hexane. After cyclization with 2-amino-3-pyridin-4-yl-2-pyridin-4-ylmethyl-propionic acid methyl ester (1.10 mmol) as described in 1B, sulfur-alkylation of 4-cyanophenacyl bromide in the presence of potassium bis(trimethylsilyl)amide as described in 1C and sulfur-extrusion in the presence of triphenylphosphine as described in 1D, 40 mg of the title compound was obtained as a white solid.

Provenance & Evidence