Synthesis and diverse general oxidative cyclization catalysis of high-valent Mo<sup>VI</sup>O<sub>2</sub>(HL) to ubiquitous heterocycles and their chiral analogues with high selectivity
作者:Nabyendu Pramanik、Satinath Sarkar、Dipanwita Roy、Sudipto Debnath、Sukla Ghosh、Saikat Khamarui、Dilip K. Maiti
DOI:10.1039/c5ra21825j
日期:——
The first synthesis and diverse oxidative cyclization catalysis properties of high-valent MoVI–triazole are demonstrated towards highly selective construction of benzimidazoles, benzothiazoles, isoxazolines, isoxazoles and their chiral analogues.
Synthesis of Glycal-Based Chiral Benzimidazoles by VO(acac)<sub>2</sub>−CeCl<sub>3</sub> Combo Catalyst and Their Self-Aggregated Nanostructured Materials
作者:Dilip K. Maiti、Samiran Halder、Palash Pandit、Nirbhik Chatterjee、Dripta De Joarder、Nabyendu Pramanik、Yasmin Saima、Amarendra Patra、Prabir K. Maiti
DOI:10.1021/jo901458k
日期:2009.11.6
combo catalyst has been developed for chemoselective cyclocondensation cum oxidation undermild reaction conditions toward synthesis of a new class of optically pure compounds, 2-(2′-C-3′,4′,6′-tri-O-benzyl/methyl-glycal)-1H-benzimidazoles. It involves an operationally simple synthetic protocol efficient for the syntheses of a wide range of chiral benzimidazoles in high yields without formation of undesired