Chrysanthemic acid, cis-(-)- → Chrysanthemic Acid

Participants

Reaction Steps

To a solution of cis chrysanthemic acid (2.0 g) in toluene (20 ml) was added a solution of aluminum tribromide (32 mg) in toluene (2.2 ml) at room temperature under a nitrogen atmosphere. Irradiation with a xenon lamp (500 W) was made for 10 minutes under stirring. After the irradiation was over, similar after-treatment as in Example 30 was applied to obtain chrysanthemic acid (1.97 g). The isomer ratio of the product was cis, 6.8%; and trans, 93.2%.

Provenance & Evidence