A simple one‐pot procedure for the preparation of 2,4,5‐triphenyl imidazole derivatives is presented. The procedure involves the lead tetraacetate oxidation of 1,2‐diols to give aldehydes in situ, which then undergo a three‐component reaction with benzil and ammonium acetate to yield the imidazole derivatives.
Lead tetraacetate is an efficient reagent for the one pot synthesis of acridines from a variety of 1,2-diols, dimedone and ammonium acetate.
铅四醋酸盐是一种有效的试剂,可用于从多种1,2-二醇、二甲二酮和醋酸铵一锅法合成吖啶。
Titanium(IV) Iodide Promoted Pinacol Coupling
作者:Ryuuichirou Hayakawa、Makoto Shimizu
DOI:10.1246/cl.2000.724
日期:2000.7
Pinacol coupling of aromatic aldehydes was efficientlypromoted by titanium tetraiodide in propionitrile to give the 1,2-diol derivatives with high dl-selectivities in high yields.
四碘化钛在丙腈中有效促进芳醛的频哪醇偶联,以高产率得到具有高 dl 选择性的 1,2-二醇衍生物。
Ruthenium Catalyzed Oxidation of 1,2‐Diols to 1,2‐Diketones Using Bromamine‐T as an Oxidizing Agent
作者:Suman L. Jain、Vishal B. Sharma、Bir Sain
DOI:10.1081/scc-200048974
日期:2005.1.1
A variety of 1,2-diols were selectively oxidized to their corresponding 1,2-diketones with bromamine-T using RuCl3 . xH(2)O as catalyst in alkaline acetonitrile/water (1 : 1) medium. The reaction was pH dependent (pH 8.4), and at higher pH the rate of the reaction decreased significantly.
Methyltrioxorhenium catalyzed oxidation of 1,2-diols to 1,2-diketones using hydrogen peroxide as oxidant
作者:Suman L. Jain、Vishal B. Sharma、Bir Sain
DOI:10.1016/j.tetlet.2003.11.131
日期:2004.2
A variety of 1,2-diols were oxidized selectively to the corresponding 1,2-diketones by the dropwise addition of 30% aqueous hydrogen peroxide using methyltrioxorhenium as catalyst. (C) 2003 Elsevier Ltd. All rights reserved.