NH3(CH2)6NH3SiF6 catalyzed highly efficient synthesis of benzimidazoles, benzoxazoles, benzothiazoles, quinoxalines and pyrimidin-2-ones/thiones

Herein, we describe a simple, highly efficient and environmentally friendly protocol for the synthesis of benzimidazoles, benzoxazoles, benzothiazoles,  3,4-dihydropyrimidin-2-ones/ thiones and quinoxalines derivatives using hybrid crystal NH3(CH2)6NH3SiF6 as a catalyst. Use of recyclable catalyst, easy work-up procedure, excellent yields, short reaction times and scalability are the important practical features of the present protocol

FeCl3/Egg shell: An Effective Catalytic System for the Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones at Room Temperature

The FeCl3/eggshell has been a new and efficient catalyst for the rapid and simple synthesis of 2,3-dihydroquinazolin-4-ones in ethanol at room temperature. The present method has advantages of low cost, mild reaction conditions, simple workup process, better recovery and reusability of catalyst, excellent yields and environmentally friendly procedure

Hybrid crystal NH₃(CH₂)₄NH₃SiF₆ as an efficient catalyst for the synthesis of benzoxazoles, benzimidazoles and benzothiazoles under solvent-free conditions

<p>An easy synthetic protocol for the synthesis of biologically active benzimidazole, benzothiazole and benzoxazole derivatives has been demonstrated using a hybrid crystal NH₃(CH₂)₄NH₃SiF₆ as a mild and efficient heterogeneous catalyst. Short reaction times, solvent-free conditions, good to excellent yields, easy reusability and use of an eco-friendly catalyst are some of the significant attributes of the present method.</p