HCID 11018798, compound → HCID 10519016, compound

Participants

Reaction Conditions

Reaction Steps

1.84 g of lithium methanethiolate are added to 2 g (5.67 mmol) of the E ester obtained in Example 33(b) in 40 ml of DMF. The reaction mixture is stirred under nitrogen at 120° C. for 4 h. After the same treatment as in Example 8, followed by a chromatography in the ether/hexane eluent (80/20), 1.69 g of a mixture of E and Z isomers of 4-[-2-(3-tert-butyl-4-hydroxyphenyl)propenyl]benzoic acid are isolated in the respective proportions (83:17). A recrystallization from the hexane/ether mixture gives 225 mg of the expected derivative which melts at 209° C.

Provenance & Evidence