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Ðľ²_ÒÀÈ»: ½ð±Ò+5, ¸ÐлӦÖú 2016-04-24 22:02:12
Ðľ²_ÒÀÈ»: ½ð±Ò+5, ¸ÐлӦÖú 2016-04-24 22:02:12
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Direct Regioselective Esterification at O-2 of beta-Cyclodextrin and Hydrolysis by Neighboring-group Participation ×÷Õß:Wang, ZZ (Wang, Zhi-Zhong)[ 1 ] ; Ma, XP (Ma, Xuan-Ping)[ 1 ] ; Wei, XG (Wei, Xiao-Gang)[ 1 ] E-JOURNAL OF CHEMISTRY ¾í: 9 ÆÚ: 3 Ò³: 1562-1568 ³ö°æÄê: 2012 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª A simple and efficient strategy for direct regioselective esterification at O-2 of beta-cyclodextrin was developed by using the combination of N, N'-carbonyldiimidazole and carbonate buffer in 1,4-dioxane, which does not require large amounts of polar organic solvents such as DMF, toxic solvents such as CH3CN, or flammable bases such as NaH. Moreover, their hydrolyses by neighboring-group participation were observed. Mono-2-tosyl-beta-cyclodextrin was liable to epoxidation, while mono-2-(p-methylbenzoyl)-beta-cyclodextrin liable to isomerization. They had different mechanisms of hydrolysis. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:beta-Cyclodextrin; Regioselective esterification; Neighboring-group participation; Hydrolysis KeyWords Plus ERIVATIVES; CATALYSIS×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Wang, ZZ (ͨѶ×÷Õß) Òþ²ØÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ Ningxia Med Univ, Sch Pharm, Ningxia Engn Res Ctr Hui Med Modernizat, Ningxia 750004, Peoples R China. ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ Ningxia Medical University µØÖ·: Òþ²ØÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ [ 1 ] Ningxia Med Univ, Sch Pharm, Ningxia Engn Res Ctr Hui Med Modernizat, Ningxia 750004, Peoples R China ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ Ningxia Medical University µç×ÓÓʼþµØÖ·:wangzzsc@yahoo.com »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ Natural Science Foundation of Ningxia Medical University XT201001 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ HINDAWI PUBLISHING CORPORATION, 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA Àà±ð / ·ÖÀà Ñо¿·½Ïò:Chemistry Web of Science Àà±ð:Chemistry, Multidisciplinary ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000302358200060 ISSN: 0973-4945 ÆÚ¿¯ÐÅÏ¢ Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports® ÆäËûÐÅÏ¢ IDS ºÅ: 919VI Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 11 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |

5Â¥2016-04-24 20:24:22
Godblesswz
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2Â¥2016-04-24 19:48:53
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ÎÄÕÂÌâÄ¿£ºDirect regioselective esterification at O-2 of ¦Â-cyclodextrin and hydrolysis by neighboring-group participation |
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Godblesswz
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4Â¥2016-04-24 19:58:58













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