Triethylamine → Trans-(E)-6-{2-{2-(4-fluoro-3-methylphenyl)-4-(pyrrolidin-1-yl)-6,6-dimethylcyclohex-1-en-1-yl}ethenyl}-4-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-one

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Reaction Steps

In a manner similar to Scheme I, 34 (0.19 g) was treated with 2N NaOH in methanol at 0°-5° C. for 18 h, followed by ethyl chloroformate (0.254 mmol) and Et3N in CH2Cl2 at 0°-5° C. Workup and purification of the residue by SiO2 using 1% Et3N in EtOAc as eluent yielded the product. mp 120°-123° C. Anal. C26H34FNO3 0.5 H2O: Theory C: 71.53; H: 8.08; N: 3.21; Found C: 71.60; H: 8.17; N: 3.03.

Provenance & Evidence