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Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases

Mladen V. Proštenik ; PLIVA, Pharmaceutical and Chemical Works Zagreb
Miljenko Dumić ; PLIVA, Pharmaceutical and Chemical Works Zagreb
Ivan Butula ; Faculty of Pharmacy and Biochemistry, Zagreb, Croatia, Yugoslavia

Puni tekst: engleski, pdf (7 MB) str. 281-288 preuzimanja: 62* citiraj
APA 6th Edition
Proštenik, M.V., Dumić, M. i Butula, I. (1984). Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases. Croatica Chemica Acta, 57 (2), 281-288. Preuzeto s https://hrcak.srce.hr/194164
MLA 8th Edition
Proštenik, Mladen V., et al. "Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases." Croatica Chemica Acta, vol. 57, br. 2, 1984, str. 281-288. https://hrcak.srce.hr/194164. Citirano 09.03.2021.
Chicago 17th Edition
Proštenik, Mladen V., Miljenko Dumić i Ivan Butula. "Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases." Croatica Chemica Acta 57, br. 2 (1984): 281-288. https://hrcak.srce.hr/194164
Harvard
Proštenik, M.V., Dumić, M., i Butula, I. (1984). 'Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases', Croatica Chemica Acta, 57(2), str. 281-288. Preuzeto s: https://hrcak.srce.hr/194164 (Datum pristupa: 09.03.2021.)
Vancouver
Proštenik MV, Dumić M, Butula I. Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases. Croatica Chemica Acta [Internet]. 1984 [pristupljeno 09.03.2021.];57(2):281-288. Dostupno na: https://hrcak.srce.hr/194164
IEEE
M.V. Proštenik, M. Dumić i I. Butula, "Chemistry of 1,3-Dioxepins. 111. Dehydrohalogenation of 5,6-Dihalogen-1,3-Dioxepanes with Strong Bases", Croatica Chemica Acta, vol.57, br. 2, str. 281-288, 1984. [Online]. Dostupno na: https://hrcak.srce.hr/194164. [Citirano: 09.03.2021.]

Sažetak
Dehydrohalogenation of 5,6-dihalogen-1,3-dioxepanes II with
KOH/MeOH or NaOCH3/MeOH under controlled reaction conditions
gave mainly 5-halogen-4,7-dihydro-1,3-dioxepines III. Further substitution
of vinylic-bromine in III whit KO-t-Bu/tert-BuOH or
KOH/MeOH led to corresponding 5-substituted-4,7-dihydro-1,3-
-dioxepines some of which underwent spontaneous isomerization
to 6,7-dihydro-1,3-dioxepines. Substitution of vinylic-bromine
appeared to follow an elimination-addition mechanism with initial
formation of an intermediate with a triple bond.

Hrčak ID: 194164

URI
https://hrcak.srce.hr/194164

Posjeta: 122 *