共查询到15条相似文献,搜索用时 59 毫秒
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一系列芳香醛在Al-TiCl3-CH2Cl2体系中反应12h,以20%~70%的产率得1,2-二醇产品,相同体系中微波辐射8rain相应1,2-二醇的产率达65%~94%.微波辐射下合成1,2-二醇的优点是时间短、产率高、操作简单. 相似文献
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低价钛引起的芳香醛肟的还原偶联反应史达清周龙虎高原戴桂元(徐州师范大学化学系221009)低价钛试剂在有机合成上的应用越来越受到人们的广泛重视。它能引起一元醛、酮和二元醛、酮发生脱氧偶联反应生成烯烃、环烯烃和杂环烯烃[1]。此外,低价钛还能引起其他官... 相似文献
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Pinacol coupling of aromatic aldehydes by aqueous vanadium(II) solution under ultrasound irradiation at room temperature can lead to the corresponding pinacols in 54–93% yields within 15–30 min. 相似文献
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Studies on the Neodymium-induced Pinacol Coupling of Aromatic Aldehydes and Ketones in Aqueous Media
Yan Jiang BIAN Hai Long WANG Bo WU Ji Tai LI 《中国化学快报》2006,17(5):591-594
1,2-Diols are very useful synthons for a variety of organic synthesis1, which have been used as intermediates for the construction of the skeletons of the biologically important natural products2. Within the last several years, various metals, such as Mg3… 相似文献
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The allylation reactions of aromatic aldehydes with allyl bromide were carried out in 89–98% yield with Sb-H2O-KF-CH3OH under ultrasound irradiation at rt for 2.5 h. The reactions in the same system gave allylic alcohols in 30–69% yield with stirring for 24 h. The main advantages of the present procedure are shorter reaction time, better yield, and environmental friendliness. 相似文献