Preparation of substituted bridged indenyl and related ligands

摘要

A process for preparing a chelating ligand of the formula (II) from a chelating ligand of the formula (I) via an sp²-sp² or sp²-sp³ coupling reaction with an organometallic compound of the formula (III). wherein B is a bridging group that is bonded to L¹ and L² in formula (I) and to L³ and L⁴ in formula (II); L¹ is a substituted monocyclic or polycyclic ligand that comprises at least one chlorine, bromine, iodine, or sulfonate substituent, directly bonded to an sp² carbon atom of the ring structure of the ligand; L² is a monoanionic ligand; or L² may, independently, be defined as L¹; L³ is the same group as L¹, but said at least one chlorine, bromine, iodine, or sulfonate substituent is replaced with a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl fragment; L⁴ is the same group as L², though, when L² is defined as L¹, L⁴ may be the same as L³ or L¹; R¹ is a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl; M¹ is an element of group 1, 2, 12, 13 or 14 of the Periodic Table of the Elements; each X², if present, is selected independently from the group consisting of halogen atoms, the hydroxyl group, alkoxy groups, aryloxy groups, mesylate, tosylate and triflate; r is 1, 2 or 3, and t is 0, 1 or 2, where r+t corresponds to the oxidation number of M¹.