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D. M.  Pore, Soudagar, M. S., Desai, U. V., Thopate, T. S., and Wadagaonkar, P. P., ?Potassium phosphate or silica sulfuric acid catalyzed conjugate addition of thiols to alpha,beta-unsaturated ketones at room temperature under solvent-free conditions?, Tetrahedron Letters, vol. 47, no. 52, pp. 9325-9328, 2006.\par \par M. A.  Kulkarni, Pandurangi, V. R., Desai, U. V., and Wadgaonkar, P. P., ?Practical and highly efficient protocol for multicomponent synthesis of beta-phosphonomalononitriles and 2-amino-4H-chromen-4-yl phosphonates using diethylamine as a novel organocatalyst?, Comptes Rendus Chimie, vol. 15, no. 9, pp. 745-752, 2012.\par \par K. S.  Pandit, Kupwade, R. V., Chavan, P. V., Desai, U. V., Wadgaonkar, P. P., and Kodam, K. M., ?Problem solving and environmentally benign approach toward diversity oriented synthesis of novel 2-amino-3-phenyl (or Alkyl) sulfonyl-4H-chromenes at ambient temperature?, ACS Sustainable Chemistry & Engineering, vol. 4, pp. 3450-3464, 2016.\par \par }