'SiO IND. 2'.'rô'-TSA: a green catalyst for solvent-free tetrahydropyranylation of alcohols and thiols - Santos, Alcindo Aparecido dos; Brito Jr., Gilmar A.; Archilha, Marcos Vinicio Lopes Rodrigues; Bele, Tiago G. A.; Santos, Guilherme P. dos; Mello, Murilo B. M. de (Journal of the Brazilian Chemical Society, 2009)