Tetrabutylammonium bromide (TBAB): a neutral and efficient catalyst for the synthesis of biscoumarin and 3,4-dihydropyrano[ c]chromene derivatives in water and solvent-free conditions

Khurana, Jitender M. ; Kumar, Sanjay

Tetrahedron letters, 2009-07, Vol.50 (28), p.4125-4127 [Periódico revisado por pares]

Elsevier Ltd

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