HCID 69463709, compound → HCID 69461265, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 410 mg (0.92 mmol) (R)-1-[6-[(R)-2-but-3-enyloxycarbonyl-pyrrolidin-1-yl]-6-oxo-hexanoyl]-pyrrolidine-2-carboxylic acid but-3-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 200 mg (51%) (12R,23R)-14,21-dioxa-1,8-diaza-tricyclo[21.3.0.0 8,12]hexacos-17-ene-2,7,13,22-tetraone as an oil, MS m/e (%): 421 (M+H+, 100).

Provenance & Evidence