The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide( cas:707-61-9 ) is researched.Product Details of 707-61-9.Arbuzov, B. A.; Zhitinkina, A. K.; Vizel, A. O.; Ivanova, E. F.; Ivanovskaya, K. M.; Giniyatullin, R. S. published the article 《Conversion of diphenylmethane diisocyanate to poly(carbodiimide) during catalysis by phospholene derivatives》 about this compound( cas:707-61-9 ) in Vysokomolekulyarnye Soedineniya, Seriya A. Keywords: polymerization catalyst phospholene derivative; catalyst polymerization phenylmethane isocyanate. Let’s learn more about this compound (cas:707-61-9).
Activity of phospholene derivatives as catalysts for polymerization of diphenylmethane diisocyanate (I) [26447-40-5] increased with increasing electron-donor activity of the substituent on the P atom of the catalyst. Kinetics data showed a dependence of the catalytic activity of phospholene derivatives on their structure, and the highest activity showed oxides of tertiary phosphines, whereas introduction of O and Cl in the ester radical decreased the polymerization rate. A nucleophilic character of the catalyst in the formation of carbodiimide-containing polymers was suggested. The highest polymerization rate of I was observed in the presence of 1-oxo-1-ethyl-3-methyl-2-phospholene (II) [56255-62-0], 1-oxo-1,3-dimethyl-3-phospholene [15450-79-0] and 1-oxo-3-methyl-1-phenyl-2-phospholene [707-61-9] as catalysts. A combined addition of I and 1-oxo-1-ethoxy-3-methyl-3-phospholene [697-31-4] had an additive catalytic effect on polymerization rate of I.
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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem