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tkyy0713

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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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cfk580713

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tkyy0713: ½ð±Ò+5, ·­ÒëEPI+1, ¡ïÓаïÖú 2012-04-28 17:56:13
abs. benzene ÎÞË®±½£¨¸ÉÔï±½£©
ferrocenaldehyde ¶þïÌú¼×È© Ã²ËÆÓõĸü¶àµÄÊÇ ferrocene carboxaldehyde
3Â¥2012-04-27 20:33:16
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