CHALCOGENOCYANATE SUPPORTED ON POLYSTYRENE, ITS PREPMATION AND ORGANIC REACTION REAGENT CONSISTING OF IT

摘要

PROBLEM TO BE SOLVED: To obtain a novel polystyrene-supported chalcogenocyanate which consists of a polystyrene containing styrene units having a chalcogenocyanate group and is useful as a reaction reagent. SOLUTION: This polystyrene-supported chalcogenocyanate has units of formula I. It is obtained by reacting a potassium chalcogenocyanate and a polystyrene containing units of formula II in a solvent. In the formulas, R1 is a bivalent hydrocarbon; R2 is a bivalent aliphatic group; Ar is an arylene; Z is a bivalent coupling group consisting of a hetero atom or carbonyl; X is a chalcogen atom; Y is a halogen; and s, t, and n are each 0 or 1. Preferably, the polystyrene containing styrene units of formula II is in the form of spherical beads of 400-200μm (100-400 mesh). A corresponding nucleophilic chalcogen reagent is obtained by reacting a reducing agent such as lithium borohydride or the like in a solvent such as tetrahydrofuran or the like.