One-pot synthesis of various xanthene derivatives using ionic liquid1,3-disulfonic acid imidazolium hydrogen sulfate as an efficient and reusable catalyst under solvent-free conditions

[1] 1,3-Disulfonic acid imidazolium hydrogen sulfate as an efficient and reusable ionic liquid catalyst for the N- Boc protection of amines[J] . Farhad Shirini,Nader Ghaffari Khaligh.Journal of Molecular Liquids . 2013

[2] Preparation, characterization and use of 1,3-disulfonic acid imidazolium hydrogen sulfate as an efficient, halogen-free and reusable ionic liquid catalyst for the trimethylsilyl protection of hydroxyl groups and deprotection of the obtained trimethylsilanes[J] . Farhad Shirini,Nader Ghaffari Khaligh,Somayeh Akbari-Dadamahaleh.Journal of Molecular Catalysis. A, Chemical . 2012

[3] Succinimide- N -sulfonic acid: An efficient catalyst for the synthesis of xanthene derivatives under solvent-free conditions[J] . Farhad Shirini,Nader Ghaffari Khaligh.Dyes and Pigments . 2012 (3)

[4] Zinc oxide nanoparticles:A highly efficient and readily recyclable catalyst for the synthesis of xanthenes [J]. Chinese Chemical Letters, 2012, 23 (11) : 1225 - 1229

[5] 1,3-Dibromo-5,5-dimethylhydantoin(DBH)/kaolin:An efficient reagent system for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions [J]. ChineseChemicalLetters, 2012, 23 (10) : 1145 - 1148

[6] Preparation of various xanthene derivatives over sulfonic acid functionalized imidazolium salts (SAFIS) as novel, highly efficient and reusable catalysts[J] . Mohammad Ali Zolfigol,Vahid Khakyzadeh,Ahmad Reza Moosavi-Zare,Abdolkarim Zare,Seyedeh Bahareh Azimi,Zhila Asgari,Alireza Hasaninejad.Comptes rendus - Chimie . 2012 (8)

[7] Synthesis of 1,8-dioxo-octahydroxanthenes and bis(indolyl)methanes catalyzed by[Et 3 NH][H 2 PO 4] as a cheap and mild acidic ionic liquid[J] . Maryam Kalantari.Arabian Journal of Chemistry . 2010 (3)

[8] Rice husk: A mild, efficient, green and recyclable catalyst for the synthesis of 12-Aryl-8, 9, 10, 12-tetrahydro[a] xanthene-11-ones and quinoxaline derivatives[J] . Farhad Shirini,Somayeh Akbari-Dadamahaleh,Ali Mohammad-Khah,Ali-Reza Aliakbar.Comptes rendus - Chimie . 2012

[9] Organocatalyst trityl chloride efficiently promoted the solvent-free synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-ones by in situ formation of carbocationic system in neutral media[J] . Ardeshir Khazaei,Mohammad Ali Zolfigol,Ahmad Reza Moosavi-Zare,Abdolkarim Zare,Mahmoud Khojasteh,Zhila Asgari,Vahid Khakyzadeh,Ali Khalafi-Nezhad.Catalysis Communications . 2012

[10] Ionic liquid triethylamine-bonded sulfonic acid {[Et 3 N–SO 3 H]Cl} as a novel, highly efficient and homogeneous catalyst for the synthesis of β-acetamido ketones, 1,8-dioxo-octahydroxanthenes and 14-aryl-14 H -dibenzo[a,j]xanthenes[J] . Abdolkarim Zare,Ahmad Reza Moosavi-Zare,Maria Merajoddin,Mohammad Ali Zolfigol,Tahereh Hekmat-Zadeh,Alireza Hasaninejad,Ardeshir Khazaei,Mohammad Mokhlesi,Vahid Khakyzadeh,Fatemeh Derakhshan-Panah,Mohammad Hassan Beyzavi,Esmael Rostami,Azam Arghoon,Razieh Roohan

[1] 1,3-Disulfonic acid imidazolium hydrogen sulfate as an efficient and reusable ionic liquid catalyst for the N- Boc protection of amines[J] . Farhad Shirini,Nader Ghaffari Khaligh.Journal of Molecular Liquids . 2013

[2] Preparation, characterization and use of 1,3-disulfonic acid imidazolium hydrogen sulfate as an efficient, halogen-free and reusable ionic liquid catalyst for the trimethylsilyl protection of hydroxyl groups and deprotection of the obtained trimethylsilanes[J] . Farhad Shirini,Nader Ghaffari Khaligh,Somayeh Akbari-Dadamahaleh.Journal of Molecular Catalysis. A, Chemical . 2012

[3] Succinimide- N -sulfonic acid: An efficient catalyst for the synthesis of xanthene derivatives under solvent-free conditions[J] . Farhad Shirini,Nader Ghaffari Khaligh.Dyes and Pigments . 2012 (3)

[4] Zinc oxide nanoparticles:A highly efficient and readily recyclable catalyst for the synthesis of xanthenes [J]. Chinese Chemical Letters, 2012, 23 (11) : 1225 - 1229

[5] 1,3-Dibromo-5,5-dimethylhydantoin(DBH)/kaolin:An efficient reagent system for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions [J]. ChineseChemicalLetters, 2012, 23 (10) : 1145 - 1148

[6] Preparation of various xanthene derivatives over sulfonic acid functionalized imidazolium salts (SAFIS) as novel, highly efficient and reusable catalysts[J] . Mohammad Ali Zolfigol,Vahid Khakyzadeh,Ahmad Reza Moosavi-Zare,Abdolkarim Zare,Seyedeh Bahareh Azimi,Zhila Asgari,Alireza Hasaninejad.Comptes rendus - Chimie . 2012 (8)

[7] Synthesis of 1,8-dioxo-octahydroxanthenes and bis(indolyl)methanes catalyzed by[Et 3 NH][H 2 PO 4] as a cheap and mild acidic ionic liquid[J] . Maryam Kalantari.Arabian Journal of Chemistry . 2010 (3)

[8] Rice husk: A mild, efficient, green and recyclable catalyst for the synthesis of 12-Aryl-8, 9, 10, 12-tetrahydro[a] xanthene-11-ones and quinoxaline derivatives[J] . Farhad Shirini,Somayeh Akbari-Dadamahaleh,Ali Mohammad-Khah,Ali-Reza Aliakbar.Comptes rendus - Chimie . 2012

[9] Organocatalyst trityl chloride efficiently promoted the solvent-free synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-ones by in situ formation of carbocationic system in neutral media[J] . Ardeshir Khazaei,Mohammad Ali Zolfigol,Ahmad Reza Moosavi-Zare,Abdolkarim Zare,Mahmoud Khojasteh,Zhila Asgari,Vahid Khakyzadeh,Ali Khalafi-Nezhad.Catalysis Communications . 2012

[10] Ionic liquid triethylamine-bonded sulfonic acid {[Et 3 N–SO 3 H]Cl} as a novel, highly efficient and homogeneous catalyst for the synthesis of β-acetamido ketones, 1,8-dioxo-octahydroxanthenes and 14-aryl-14 H -dibenzo[a,j]xanthenes[J] . Abdolkarim Zare,Ahmad Reza Moosavi-Zare,Maria Merajoddin,Mohammad Ali Zolfigol,Tahereh Hekmat-Zadeh,Alireza Hasaninejad,Ardeshir Khazaei,Mohammad Mokhlesi,Vahid Khakyzadeh,Fatemeh Derakhshan-Panah,Mohammad Hassan Beyzavi,Esmael Rostami,Azam Arghoon,Razieh Roohan