Hydrazine hydrate (1:1) → HCID 10914026, compound

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Reaction Steps

The aldehyde-ester, hydrate, and hydroxy lactone from Example 16 (0.10 g, 3 mmol), were dissolved in 100 mL of ethanol. This solution was treated with hydrazine monohydrate (0.15 mL, 30 mmol) and the resulting solution was stirred at reflux in a Soxhelet apparatus containing molcular sieves. After 18 hours, the reaction mixture was cooled and the volatile materials removed under reduced pressure. The residue was partitioned between ethyl acetate and aqueous HCl. The aqueous layer was washed twice with ethyl acetate. The combined organic extracts were washed twice with brine, dried over MgSO4, and filtered. The filtrate was concentrated under reduced pressure and the residue was purified by column chromatography (4:1 hexanes/ethyl acetate) to obtain the title compound (yield: 50 mg, 53%). 1H NMR (300 MHz, CDCl3) δ 2.46 (s, 3H), 3.75 (d, J=12 Hz, 1H), 3.87 (d, J=12 Hz, 1H), 6.93–7.08 (m, 6H), 7.16 (d, J=9 Hz, 2H), 8.71 (s(br), 1H). MS (DCI/NH3) m/z 315 (M+H)+ and m/z 332 (M+NH4)+.

Provenance & Evidence