Sun, Ziyue;Zhao, Yanxia;Prior, Timothy J.;Elsegood, Mark R. J.;Wang, Kuiyuan;Xing, Tian;Redshaw, Carl published 《Mono-oxo molybdenum(VI) and tungsten(VI) complexes bearing chelating aryloxides: synthesis, structure and ring opening polymerization of cyclic esters》. The research results were published in《Dalton Transactions》 in 2019.Related Products of 106-02-5 The article conveys some information:
The mono-oxo aryloxide complexes [M(O)(L1)2] (M = Mo (1·hexane), W(2·2MeCN)) were prepared from [Mo(O)(Cl)4] or [W(O)(Ot-Bu)4] and two equivalent of the di-phenol 2,2′-ethylidenebis(4,6-di-tert-butylphenol) L1H2, resp. Use of in situ generated [Mo(O)(Ot-Bu)4] with two equivalent of L1H2 also gave 1·2MeCN. In the presence of adventitious oxygen, attempts to generate in situ [Mo(O)(Ot-Bu)4] and reaction with one equivalent of L1H2 afforded the bi-metallic complex [Mo(O)(L1)(μ-O)Li(THF)(MeCN)]2·2MeCN (3·2MeCN). Use of the tetra-phenol α,α,α’,α’-tetrakis(3,5-di-tert-butyl-2-hydroxyphenyl)-p-xyleneH4 (L2H4) with [Mo(O)(Oi-Pr)4] gave {[Mo(O)]L2}2 (4), while the analogous W complex {[W(O)]L2}2 (5) was isolated from the reaction of L2H4 with [W(O)(Ot-Bu)4]. Similar reaction of p-tert-butylcalix[4]areneH4 (L3H4) with [Mo(O)(Oi-Pr)4] afforded [Mo(O)L3(NCMe)]·3MeCN (6). Modifications of known routes were employed to access complexes [W(Cl)2L3]·3.5MeCN (7·3.5MeCN) and [W(O)L3(NCMe)] (8), while use of [WO(Ot-Bu)4] with L3H4 unexpectedly afforded [W(Ot-Bu)2L3]·MeCN (9·MeCN). The mol. crystal structures for 1–9 are reported, and the ability of these complexes to act as catalysts for the ring opening polymerization (ROP) of ε-caprolactone (ε-CL), δ-valerolactone (δ-VL) and ω-pentadecalactone (ω-PDL) was studied. The Mo complexes 1 and 4 were the best performers for ε-Cl and δ-VL, but all complexes exhibited poor control and were also inactive toward the ROP of PDL.Oxacyclohexadecan-2-one (cas: 106-02-5) were involved in the experimental procedure.
Oxacyclohexadecan-2-one(cas:106-02-5) is a monomer used to make PGA-co-pentadecalactone polymers to be used in the development of directly compressed prolonged release tablets of slightly soluble drugs such as ketoprofen.Related Products of 106-02-5It may be used for the synthesis of poly(pentadecanolide) (PPDL) by Novozyme 435 catalyzed ring-opening polymerization.
Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics