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4 (4¡¯-aminophenyl) -2,6-dimethyl-3,5-dicarbo-isopropoxy- 1,4-dihydropyridine 120 g. 4-(4¡¯-nitrophenyl) -2,6-dimethyl-3,5-dicarboiso- propoxy-1,4-dihydropyridine are kept in 500 cc. isopro panol in the presence of 10 g. Raney nickel under hydro gen (pressure autoclave, 70¡ã C.) and, when the hydrogen absorption is completed (1½ to 2 hours), the product is filtered off with suction. After concentration and cooling, pale yellow crystals of M.P. 184¡ã C. are obtained. |
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2Â¥2009-11-16 16:03:52
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ye5731322(½ð±Ò+1,VIP+0):лл 11-17 11:12
ye5731322(½ð±Ò+1,VIP+0):лл 11-17 11:12
| 4 (4 ' - aminophenyl) 2,6¶þ¼×»ù3,5 dicarbo isopropoxy 1,4-dihydropyridine 120 g. 4 (4 ' - nitrophenyl) 2,6¶þ¼×»ù3,5 dicarboiso propoxy-1,4-dihydropyridineÊÇ ±£³Ö ÔÚ500 cc.ÔÚ10 g. RaneyÄøÃæÇ°µÄpanolÔÚhydro&Ö®ÏÂ; º¦Ðß; gen (ѹÁ¦Ñ¹ÈÈÆ÷£¬ 70¡ã C.) ²¢ÇÒ£¬µ±ÇâÎüÊÕÍê³Éʱ(1& frac12; ¶Ô2¸öСʱ)£¬²úÆ·Â˳öÓëÎü¡£ ÔÚ¼¯ÖкÍÀäÈ´ÒԺ󣬿ɻñµÃ M.P. 184¡ãµ»ÆµÄË®¾§ C. |
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