Polystyrene-supported palladacycle catalysts

摘要

This invention relates to a recyclable palladacycle catalyst of formula in which each is a single bond or a double bond, provided that if one is a double bond, its neighboring is not a double bond; each of X and Z, independently, is -P(R')-, -S-, -N(R')-, or -N-, in which R' is alkyl, aryl, cyclyl, heteroaryl, or heterocyclyl; each of Y₁ and Y₂, independently, is an anion of an organic or inorganic acid; each of X₁, X₂, X₃, Z₁, Z₂, and Z₃, independently, is -C-, -CR''-, in which R'' is H, alkyl, aryl, cyclyl, heteroaryl, or heterocyclyl; and each of R₁, R₂, R₃, R₄, R₅, R₆, R₇, and R₈, independently, is H, alkyl, aryl, cyclyl, heteroaryl, or heterocyclyl, or R₁, X, X₁, and R₂, together form a 3-8 membered ring, or R₂, X₁, X₂, and R₃, together form a 3-8 membered ring, or R₃, X₂, X₃, and R₄, together form a 3-8 membered ring, or R₅, Z, Z₁, and R₆, together form a 3-8 membered ring, or R₆, Z₁, Z₂, and R₇, together form a 3-8 membered ring, or R₇, Z₂, Z₃, and R₈, together form a 3-8 membered ring; provided that one of R₁, R₂, R₃, R₄, R₅, R₆, R₇, and R₈, or the ring formed from R₁, X, X₁, and R₂, or the ring formed from R₂, X₁, X₂, and R₃, or the ring formed from R₃, X₂, X₃, and R₄, or the ring formed from R₅, Z, Z₁, and R₆, or the ring formed from R₁, Z₁, Z₂, and R₇, or the ring formed from R₇, Z₂, Z₃, and R₈ is connected to a first polymer. Also included in this invention are a method of promoting a coupling reaction using the above-described palladacycle compound and a method of making it.