Polymer-supported oxobis(pentane-2,4-dionato)vanadium(IV) catalyst for reactions involving t-butyl hydroperoxide

Abstract

Polymer-supported Oxobis( pentane-2,4-dionato)vanadium( IV) Catalyst for Reactions involving t-Butyl Hydroperoxide

Polymer-Attached Catalysts

“…A polymer-supported oxobis(pentane-2,4-dionato)vanadium(V) complex (3) has been shown to catalyze the homolytic decomposition of t-butylhydroperoxide, and its reaction with dimethyl sulfoxide, dibutyl thioether and cyc10hexene to give dimethyl sulfate, dibutyl sulfoxide and cyc10hexene oxide, respectively [74]. Comparative studies between the polymer-supported and homogeneous systems have demonstrated enhanced stability for the polymersupported, catalytically active species.…”

Transition-metal-catalyzed epoxidations

“…Several monoperoxo-molybdenum complexes, MoO-(02)L" (63), and diperoxo-molybdenum complexes, Mo0(02)2L!L2 (64), have been prepared and found to epoxidize many different types of alkenes.174 70 MoO(02)C12*HMPA epoxidizes unactivated alkenes, but the epoxide is mainly formed at the beginning of the reaction and progressively disappears to be replaced by products of oxidative cleavage. 70 The bis(hydroxamato) monoperoxo complex MoO(02)-[PhC0N(Ph)0]2 only epoxidizes allylic alcohols that can displace one hydroxamate ligand on molybdenum.…”

Polymer-supported complexes. Part 3. Synthesis of a polystyreneanchored molybdenum(V) dithiocarbamato-derivative and its applications in reactions involving t-butyl hydroperoxide

“…The e.s.r. spectrum of a portion of the beads (0.2 g) isolated after 12 h showed only a very weak signal identical to that of (1). G.c.…”