[1]许招会,熊斌,雷志伟.无溶剂下磷钨酸镧催化合成5-亚烃基-2,2-亚丁基-1,3-二噁烷-4,6-二酮[J].江西师范大学学报(自然科学版),2013,(04):337-341.
 XU Zhao-hui,XIONG Bin,LEI Zhi-wei.Solvent-Free Synthesis of 5-Alkenyl-2,2-Butylidene-1,3-Dioxane-4,6-Diones with LaPW12O40 as Catalyst[J].,2013,(04):337-341.
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无溶剂下磷钨酸镧催化合成5-亚烃基-2,2-亚丁基-1,3-二噁烷-4,6-二酮()
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《江西师范大学学报》(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2013年04期
页码:
337-341
栏目:
出版日期:
2013-09-01

文章信息/Info

Title:
Solvent-Free Synthesis of 5-Alkenyl-2,2-Butylidene-1,3-Dioxane-4,6-Diones with LaPW12O40 as Catalyst
作者:
许招会;熊斌;雷志伟
江西师范大学化学化工学院,江西南昌,330027
Author(s):
XU Zhao-hui;XIONG Bin;LEI Zhi-wei
关键词:
22-亚丁基-13-二噁烷-46-二酮磷钨酸镧芳香醛缩合反应
Keywords:
22-butylidene-13-dioxane-46-dioneLaPW12O40aromatic aldehydescondensation reaction
分类号:
O621.25
文献标志码:
A
摘要:
在LaPW12O40催化下,芳香醛和2,2-亚丁基-1,3-二噁烷-4,6-二.酮在无溶剂条件下合成了8种新型5-亚烃基-2,2-亚丁基-1,3-二噁烷-4,6-二酮.当催化剂的用量为5;(摩尔分数)时,室温反应20 ~40 min,收率为87.6;~94.3;.此外,还探讨了LaPW12O40的催化机理.该方法具有条件温和,反应时间短且收率高的优点.催化剂LaPW12O40对环境友好且可循环利用.
Abstract:
Eight kinds of 5-alkenyl-2,2-butylidene-1,3-dioxane-4,6-diones were synthesized by the Knoevenagel condensation reaction of aromatic aldehydes with 2,2-pentamethylene -1,3-dioxane-4,6-dione using LaPW12O40 as catalyst,without solvent.The results indicate that the yields ranged from 87.6%~94.3%,when using 5%( molar fraction)LaPW12O40 and reacting at room temperature for 20~40 min.Furthermore,a proposed reaction mechanism for the reaction catalyzed by LaPW12O40 was speculated.Compared to the classical Knoevenagel condensation reaction,the main advantages of the present procedure were milder conditions,shorter reaction time and higher yields,which afforded an effective method to synthesize 5-alkenyl-isopropylidene malonate derivatines.Further study showed that LaPW12O40 was environmentally friendly and reused for four times without any noticeable decrease in the catalytic activity.

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备注/Memo

备注/Memo:
江西科技国际合作课题(kj082563);江西省研究生创新专项基金(YC10A051)
更新日期/Last Update: 1900-01-01