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To a solution of ketoester 1 (10 mmol) in abs. benzene (30 mL) sodium (0.24 g, 10.5 mmol) was added, and the mixture was stirred for 3¨C4 h until sodium dissolved. Õâ¾ä»°ÖÐabs. benzeneÊÇʲôÒâ˼£¿ To a suspension of cyclopentenone 4h (0.10 g, 0.30 mmol) in a mixture of 10%-solution of KOH in water (1 mL) and ethanol (1 mL) corresponding aldehyde (0.45 mmol) was added. The reaction mixture was refluxed for 2 h, poured into water (10 mL), the precipitate was filtered off and washed with water (2 ¡Á 10 mL) and petrol. ether (2 ¡Á 10 mL) and recrystallized from the ethanol-water mixture. In the case of ferrocenaldehyde the reaction mixture was poured into water (10 mL) and extracted with ethyl acetate (2 ¡Á 20 mL), the combined extracts were washed with water (2 ¡Á 20 mL), dried with magnesium sulfate and evaporated in vacuum, the residue was purified by column chromatography eluting with petrol. ether/ethyl acetate 6:1. Õâ¶Î»°ÖÐferrocenaldehyde ʲôÒâ˼£¿ |
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ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)
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2Â¥2012-04-27 17:31:44
cfk580713
ÖÁ×ðľ³æ (ÖøÃûдÊÖ)
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3Â¥2012-04-27 20:33:16














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