Triphenylphosphine → HCID 69882181, compound

Participants

Reaction Steps

Diethyl azodicarboxylate (0.235 ml, 1.49 mmol) was added at 0° C. to a stirred solution of triphenylphosphine (0.392 g, 1.49 mmol) and 3-(6H-dibenzo[b,e]oxepin-11-ylidene)-1-propanol (0.252 g, 1.0 mmol) in dry THF (5 ml) and the mixture stirred for 5 min. A solution of ethyl 2-ethoxy-3-(4-hydroxyphenyl)-propionate (0.356 g, 1.49 mmol) in dry THF (5 ml) was then added, the mixture allowed to warm to room temperature, and stirring continued for 18 h. The resulting mixture was treated with water (50 ml), and the products extracted into dichloromethane (4×50 ml). The extracts were combined, washed with brine, dried (Na2SO4) and evaporated to an orange gum. This was then purified by column chromatography on silica gel (20% Et2O in petroleum eluent) to give the title compound as an inseparable 4:1 mixture of E and Z double-bond isomers, as a pale yellow gum; 0.252 g (53%).

Provenance & Evidence