MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202611107372 A) filed by Malaviya National Institute Of Technology Jaipur on September 07, 2026, for A Palladium(ii) Complex Bearing A Pyrazolyl-1,2,3- Triazolyl Hybrid Ligand For C-H Bond Activation Toward N-Substituted Carbazole Synthesis.
Inventors include Barun Jana; Bhawana Shekhawat; and Rishi Raj.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: The present invention relates to an asymmetric dinuclear palladium(II) complex comprising a pyrazolyl-1,2,3-triazolyl hybrid ligand and a process for preparation thereof. The complex comprises 1-benzyl-4-((5-benzyl-3-phenyl-1H-pyrazol-1-yl)methyl)-1H-1,2,3-triazole (L1) coordinated to palladium through pyrazolyl and triazolyl nitrogen atoms, with two palladium centres interconnected through bridging chloride ligands. The invention further provides a phosphine-free catalytic process for preparing N-substituted carbazoles by reacting 2-iodobiphenyl derivatives with nitrogen-containing coupling partners through C–N bond formation followed by intramolecular C–H bond activation and cyclization. The nitrogen-containing coupling partners include amines and benzenesulfonamide derivatives. The invention particularly provides direct preparation of N-sulfonyl carbazoles using the disclosed palladium complex and selected N-sulfonyl carbazole compounds obtained thereby. The catalytic process exhibits substrate compatibility and preparative-scale applicability.
Disclaimer: Curated by HT Syndication.
