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Cooperative catalysis with binary Lewis acid–Lewis base system for the coupling of carbon disulfide and epoxides
Author(s) -
Wang YiMing,
Li Bo,
Wang Hui,
Zhang ZhiChao,
Lu XiaoBing
Publication year - 2012
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.2908
Subject(s) - chemistry , lewis acids and bases , catalysis , nucleophile , lewis acid catalysis , propylene oxide , salt (chemistry) , carbon disulfide , substituent , steric effects , polymer chemistry , organic chemistry , ammonium , copolymer , polymer , ethylene oxide
The cycloaddition of epoxides with carbon disulfide proceeds effectively by using a binary catalyst system of tetradentate Schiff‐base aluminum complexes (designated as salenAlX) as Lewis acid in connection with a nucleophilic co‐catalyst, such as quaternary ammonium salt. The steric factor of the substituent groups on the aromatic rings of salenAlX and the anion of quaternary ammonium salt all have significant effects on the activity of the binary catalyst system, as well as the selectivities of the resultant cyclic products. The effects of temperature, time and the molar ratio of reactants were also investigated in detail with regard to propylene oxide with carbon disulfide, and a plausible mechanism was proposed. Copyright © 2012 John Wiley & Sons, Ltd.