HCID 69463152, compound → HCID 69461682, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.20 g (2.5 mmol) (R)-1-[6-[(R)-2-pent-4-enyloxycarbonyl-pyrrolidin-1-yl]-6-oxo-hexanoyl]-pyrrolidine-2-carboxylic acid pent-4-enyl ester and 40 mg benzylidene-bis(tricyclohexylphosphine)dichlororuthenium in 30 ml dry dichloromethane was stirred at 50° C. overnight. Removal of the solvent and chromatography on silicagel with ethylacetate/acetone with a ratio of 8/2 gave 430 mg (38%) (12R,25R)-14,23-dioxa-1,8-diaza-tricyclo[23.3.0.0 8,12]octacos-18-ene-2,7,13,24-tetraone as an oil, MS m/e (%): 449 (M+H+, 100).

Provenance & Evidence