Lewis Acid-Promoted Synthesis of Unsymmetrical and Highly Functionalized Carbazoles and Dibenzofurans from Biaryl Triazenes: Application for the Total Synthesis of Clausine C, Clausine R, and Clauraila A
作者:Weijun Yang、Jun Zhou、Binjie Wang、Hongjun Ren
DOI:10.1002/chem.201102802
日期:2011.12.2
A natural approach: A Lewis acid‐promoted nucleophilic aromatic substitution approach to the regioselective synthesis of highly substituted carbazoles and dibenzofurans has been developed. The annulation process is applied to the totalsynthesis of carbazole alkaloids clausineC, clausineR, and clauraila A (see scheme).
Regioselective Synthesis of Phenols and Halophenols from Arylboronic Acids Using Solid Poly(<i>N</i>-vinylpyrrolidone)/ Hydrogen Peroxide and Poly(4-vinylpyridine)/Hydrogen Peroxide Complexes
作者:G. K. Surya Prakash、Sujith Chacko、Chiradeep Panja、Tisa Elizabeth Thomas、Laxman Gurung、Golam Rasul、Thomas Mathew、George A. Olah
DOI:10.1002/adsc.200900071
日期:2009.7
reagents has been further expanded for the one‐pot synthesis of halophenols. Density functional theory calculations were carried out on hydrogen peroxide complexes of N‐ethylpyrrolidone and 4‐ethylpyridine as models to get a better understanding of structure and behavior of hydrogen peroxide complexes of the polymers poly(N‐vinylpyrrolidone) and poly(4‐vinylpyridine) compared to aqueous hydrogen peroxide
Iodination of phenols using chloramine T and sodium iodide
作者:Tadashi Kometani、David S. Watt、Tae Ji
DOI:10.1016/s0040-4039(00)94774-9
日期:——
A convenient procedure for the iodination of many substitutedphenols uses chloramineT and sodium iodide in DMF, DMSO, or acetonitrile.
许多取代的苯酚加碘的简便方法是在DMF,DMSO或乙腈中使用氯胺T和碘化钠。
Regioselective iodination of phenol and analogues using N-iodosuccinimide and p-toluenesulfonic acid
作者:Pakorn Bovonsombat、Juthamard Leykajarakul、Chiraphorn Khan、Kawin Pla-on、Michael M. Krause、Pratheep Khanthapura、Rameez Ali、Niran Doowa
DOI:10.1016/j.tetlet.2009.03.128
日期:2009.6
Mild and highly regioselective monoiodination of phenol and analogues is achieved in high to excellent yields at room temperature with a combination of stoichiometric p-toluenesulfonic acid and N-iodosuccinimide.
Peroxide/Potassium Iodide Redox Systems for<i>in situ</i>Oxyiodination of Organic Compounds under Liquid-Phase and Solvent-Free Conditions
作者:Gattu Venkateshwarlu、Akarapu Premalatha、Anuganti Chakradhar、Kamatala Chinna Rajanna、Pondichery Kuppuswamy Sai Prakash
DOI:10.1002/hlca.200900188
日期:2010.2
Iodination of certain aromatic amines and phenols are triggered by the oxidation of KI by peroxy compounds such as tert‐butyl hydroperoxide (tBuOOH) under liquid‐phase and solvent‐free conditions by grinding the reactants in a mortar with a pestle. The reactions afforded corresponding iodo derivatives in good yield with high regioselectivity (Table 1).