benzyl [(R)-2-(1-allyl-1H-imidazol-4-yl)-1-((S)-1-allyloxymethyl-2-methylpropylcarbamoyl)ethyl]carbamate → Benzyl((8S,11R)-8-isopropyl-10-oxo-6-oxa-1,9,14-triazabicyclo[11.2.1]hexadeca-3,13(16),14-trien-11-yl)carbamate

関与物質

反応手順

A solution of 0.735 g (1.62 mmol) of benzyl[(R)-2-(1-allyl-1H-imidazol-4-yl)-1-((S)-1-allyloxymethyl-2-methylpropylcarbamoyl)ethyl]carbamate in 370 ml of dichloromethane was mixed with 0.210 g (0.24 mmol) of benzylidene[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]dichloro(tricyclohexylphosphine)ruthenium (Grubbs II catalyst) and stirred at RT. The mixture was stirred at RT for several days with repeated addition of Grubbs II catalyst until starting material was no longer present (LC/MS). The mixture was concentrated and the residue was chromatographed on silica gel (dichloromethane/methanol 99:1→9:1). 0.506 g of the title compound was obtained.

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