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Articles by Khalid Mohammed Khan
Total Records ( 3 ) for Khalid Mohammed Khan
  Khalid Mohammed Khan , Sumbul Ahmed , Zulfiqar Ali Khan , Mubeen Rani , Shahnaz Perveen and Wolfgang Voelter
  A microwave-assisted, environmentally friendly, high-yielding, time-saving synthesis of medicinally important 3-substituted isocoumarins was carried out in a single step by direct condensation of homophthalic acid with aryol and acyl chlorides under solvent-free conditions without any solid support. The synthesised isocoumarins were structurally characterised by microanalysis, 1H NMR, EI, IR and UV.
  Khalid Mohammed Khan , Shahnaz Perveen , Safdar Hayat , Muhammad Ali , Wolfgang Voelter and Zia- Ullah
  In situ generation of hydrogen iodide from cesium iodide/methanesulfonic acid was found to be an attractive reagent combination for the conversion of alkyl, allyl, and benzyl alcohols to their corresponding iodides under mild conditions. The method is compared with that using cesium iodide/p-toluenesulfonic acid or cesium iodide/aluminium chloride.
  Shahnaz Perveen , Arfa Yasmin and Khalid Mohammed Khan
  The reaction of isocyanates and isothiocyanates with long-chain alcohols, e.g. n-hexanol, n-heptanol and n-octanol, exclusively gave N-aryl-O-alkyl carbamates, while N-aryl-O-alkyl carbamates were formed along with symmetrical 1,3-disubstituted ureas and thioureas when the same reactions were carried out with small-chain alcohols at room temperature without using any solvent.
 
 
 
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