Pyridine → HCID 53811313, compound

Participants

Reaction Steps

1-(1-Chloro-1-t-butoxycarbonylmethyl)-3-(triphenylmethylamino)-4-(3-p-fluorophenylprop-2-ynylthio)azetidin-2-one (570mg) was dissolved in a 1:1 mixture of dry tetrahydrofuran and dioxan (20ml) under nitrogen. Triphenylphosphine (495mg) and dry pyridine (150mg) were added and the mixture heated at 49° for 16 hours. The reaction mixture was filtered the filtrate evaporated. The residue was triturated with toluene and the soluble portion re-evaporated. Chromatography on silica afforded 1-(1-t-butoxycarbonyl-1-triphenylphosphoranylidenemethyl)-3-(triphenylmethylamino)-4-(3-p-fluorophenylprop-2-ynylthio) azetidin-2-one, as a white solid (418mg). νmax (CHCl3) 1745, 1630 (broad) cm-1.

Provenance & Evidence