Ethanol → HCID 22986047, compound

Participants

Reaction Steps

A mixture of (2S,4S)-2-formyl-4-BOCsulfanyl-pyrrolidine-1-carboxylic acid allyl ester (compound(1)) ( 711 mg), ethanol(25 ml), 1-naphthylamine(333 mg) and 3A molecular sieves(4.5 g.) was stirred under an argon atmosphere at ambient temperature for 6 hours. Acetic acid (0.4 ml) was added followed by sodium cyanoborohydride(l70 mg). The mixture was then stirred for a further 20 hours when the sieves were removed by filtration. The filtrate was concentrated under reduced pressure and the residue applied to a silica column and eluted with ethyl acetate/hexane(20:80) to give (2S,4S)-1-allyloxycarbonyl-2[(naphthalen-1-ylamino)-methyl]-4-BOCsulfanylpyrrolidine (compound(31)) as a clear oil (560 mg).

Provenance & Evidence