Formaldehyde → HCID 67507506, compound

Participants

Reaction Steps

3-[(2S,4S)-4-(4-Anilinopiperidino)-1-tert-butoxycarbonyl-2-pyrrolidinylcarbonyl]-1,3-thiazolidine [product of Example 148 (3), 1.18 g] was dissolved in 1,2-dichloroethane (75 mL), and sodium triacetoxyborohydride (5.32 g), acetic acid (0.73 mL) and 37% formaldehyde solution (5.0 mL) were added thereto. The mixture was stirred at room temperature for 12 hr. The reaction mixture was added to water, and the mixture was extracted with chloroform. The extract was dried and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to give 3-{(2S,4S)-1-tert-butoxycarbonyl-4-[4-(N-methylanilino)piperidino]-2-pyrrolidinylcarbonyl}-1,3-thiazolidine (967 mg).

Provenance & Evidence