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2Â¥2010-10-26 18:42:01
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whb265(½ð±Ò+1, ²©Ñ§EPI+1): 2010-10-28 17:32:04
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4Â¥2010-10-27 12:47:45
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5Â¥2010-10-29 09:28:39
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Á½²½×ö£ºÏȺϳɰ±»ùÑÇí¿À໯ºÏÎµÚ¶þ²¿ÓÃ̼Ëá¼Ø´ß»¯ÍÑÈ¥ÑÇ»ÇËἯÍÅ¡£Ò» A 500-mL flask was charged
with tert-butyl carbamate (10.0 g, 85.5 mmol, 1.00 equiv) and
benzenesulfinic acid sodium salt (28 g, 170 mmol, 2.0 equiv). Solids were
suspended in a solution of methanol in water (1:2, 250 mL). Benzaldehyde
(13.0 mL, 128 mmol, 1.50 equiv) was then added in one portion, followed by
formic acid (98%, 6.4 mL). The reaction was allowed to stir 48 h at 23 ¡ãC,
during which time the product precipitated as a white solid. which was isolated via B¨¹chner funnel
filtration and purified via trituration with water and diethyl ether. After drying in vacuo, 7a was
obtained as a white solid (23.6 g, 80%).¶þ A 250-mL, 3-neck flask was charged with
anhydrous potassium carbonate (12.4 g, 90.0 mmol, 6.00 equiv) and anhydrous
sodium sulfate (15 g). The solids were placed under vacuum and flame-dried.
Once cool, 7a (5.2 g, 15 mmol, 1.0 equiv) was added under a positive stream of
nitrogen, followed by anhydrous tetrahydrofuran (140 mL). The flask was
capped with a water-cooled reflux condenser under an atmosphere of nitrogen
and heated to reflux with stirring. After 15 h, the reaction was cooled to ambient temperature and
the solids removed via filtration through a fine, glass frit. The filtrate was concentrated in vacuo
and dried under high vacuum to give imine  as a colorless oil
6Â¥2010-11-08 20:24:51
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whb265(½ð±Ò+10): 2010-11-13 12:01:01
J. Am. Chem. Soc., 2002, 124 (44), pp 12964¨C12965
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7Â¥2010-11-08 20:26:23
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