A mesoporous SBA-15 silica catalyst functionalized with phenylsulfonic acid groups (SBA-15-Ph-SO3H) as a novel hydrophobic nanoreactor solid acid catalyst for a one-pot three-component synthesis of 2H-indazolo[2, 1-b]phthalazine-triones and triazolo[1, 2-a]indazole-triones. Issue 84 (16th September 2015)