5695-63-6Relevant academic research and scientific papers
Effect of Crown Ethers on Bromination of 2-Methyl-1,3-dioxacycloalkanes with N-Bromosuccinimide
Kotlyar,Pluzhnik-Gladyr',Zlotskii
, p. 283 - 284 (2007/10/03)
Crown ethers exert a pronounced catalytic effect on bromination of 2-methyl-1,3-dioxacycloalkanes with N-bromosuccinimide and increase the yield of 2-bromomethyl derivatives.
Catalytic Effect of Crown Ethers in the Bromination of 2-Alkyl-substituted 1,3-Dioxacyclanes
Kotlyar,Pluzhnik-Gladyr'
, p. 914 - 916 (2007/10/03)
Bromination of 2-alkyl-1,3-dioxacyclanes with molecular bromine in the presence of crown ethers in benzene (chloroform) results, regardless of the acetal ring size, in exclusive formation of 2-(1-bromoalkyl)-1,3-dioxacyclanes in near-quantitative yields. The use of crown ethers allows the bromination to be accomplished at room temperature.
CHARACTER OF THE PRODUCTS OF BROMINATION OF 1,3-DIOXACYCLANES WITH N-BROMOSUCCINIMIDE
Kotlyar, S. A.,Kamalov, G. L.
, p. 118 - 119 (2007/10/02)
The dependence of the character and composition of the products of the reaction of equimolar amounts of N-bromosuccinimide and 1,3-dioxacyclanes on the ring size and the character of the substituent in the 2 position of the 1,3-dioxacyclane ring was examined.Reasons for the primary formation of bromination products of different types for five-, six-, and seven-membered cyclic acetals are proposed.
Kinetics and mechanism of bromination of cyclic acetals with 1,4-dioxane dibromide
Kotlyar,Kamalov,Savranskaya,Bogatskii
, p. 120 - 123 (2007/10/02)
It is shown that the reactivities of cyclic formals in the case of bromination with dioxane dibromide increase in the order 1,3-dioxepane > 1,3-dioxalane ? 1,3-dioxane, which is explained not only by steric factors but also by the ease of cleavage of the C4-O3 bond of the dioxacyclane ring. The bromination of cyclic acetals takes place through prior enolization of the cyclic acetal with subsequent electrophilic addition of bromine to the double bond.
