Reductive Coupling of Carbonyl Compounds to Pinacols with Zinc in THF-Saturated Aqueous Ammonium Chloride
作者:Rahim Hekmatshoar、Issa Yavari、Yahya S. Beheshtiha、Majid M. Heravi
DOI:10.1007/s007060170083
日期:2001.6
In the presence of metallic zinc, aldehydes and ketones experience reductive coupling in tetrahydrofuran-saturated aqueousammoniumchloride (5:3) to afford the corresponding pinacols in moderate to high yields.
Studies on the Lanthanum‐Induced Pinacol Coupling of Aromatic Aldehydes and Ketones in Aqueous Media
作者:Yan‐Jiang Bian、Xu‐Guang Yu、Hong‐Wei Peng、Ji‐Tai Li
DOI:10.1080/00397910600781307
日期:2006.8.1
Abstract The pinacol coupling of aromaticaldehydes and ketones was carried out in 16–71% yield using La–36%HAc–CH2Cl2 system with stirring at rt in 4 h. The reactions in the same system gave pinacols in 12–91% yield under ultrasound irradiation at rt in 2 h.
Pinacol Coupling of Aromatic Aldehydes and Ketones Using TiCl<sub>3</sub>‐Al‐EtOH Under Ultrasound Irradiation
作者:Ji‐Tai Li、Zhi‐Ping Lin、Na Qi、Tong‐Shuang Li
DOI:10.1081/scc-200039396
日期:2004.12.31
Titanium trichloride in EtOH can be reduced by Al to the corresponding low-valent titanium complexes. This can reduce some aromatic aldehydes and ketones to the corresponding pinacols in 40-82% yields within 30-90 min at r.t. under ultrasound irradiation.
Pinacol Coupling of Aromatic Aldehydes and Ketones in Ethyl Acetate Mediated by TiCl<sub>4</sub>‐Mg
作者:Ke Wang、Shu‐Xiang Wang、Ming‐Zhu Gao、Ji‐Tai Li
DOI:10.1080/00397910500522090
日期:2006.6.1
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