Matches in SemOpenAlex for { <https://semopenalex.org/work/W1990408976> ?p ?o ?g. }
Showing items 1 to 58 of
58
with 100 items per page.
- W1990408976 abstract "Publisher Summary This chapter reviews electrophilic substitution of heterocycles including the reactions of 1,3-azoles with various electrophiles. The preparation of isoxazolines by cycloaddition reactions of nitrile oxides with alkenes and their use in the synthesis of unsaturated ketones is discussed. The major routes to isoxazoles involve ring closure either by formation of the O–C bond or by the concerted formation of the C4–C5 and the O–C bonds. Treatment of either triformylmethane or the masked aldehyde salt with hydroxylamine gives access to 4-substituted isoxazoles which are the synthetic equivalents of cyanoacetaldehydes. There are several examples of the formation of isoxazoles from oxygen heterocyclic precursors. The reactions are particularly susceptible to changes in reaction conditions and structural feature. The synthesis of isoxazoles and their reduced derivatives by 1,3-dipolar cycloaddition is frequently used. A detailed account of the reactivity of furoxans, 1,2,5-oxadiazole 2-oxides, towards dipolarophiles concludes that both nitrone-type 1,3-dipolar adducts and nitrile oxide like derivatives are formed, with the latter route favored when dimethylformamide is used as co-solvent." @default.
- W1990408976 created "2016-06-24" @default.
- W1990408976 creator A5053896327 @default.
- W1990408976 creator A5068061303 @default.
- W1990408976 date "1975-01-01" @default.
- W1990408976 modified "2023-09-27" @default.
- W1990408976 title "Five-membered heterocyclic compounds with two different hetero-atoms in the ring" @default.
- W1990408976 doi "https://doi.org/10.1016/b978-044453346-3.50156-6" @default.
- W1990408976 hasPublicationYear "1975" @default.
- W1990408976 type Work @default.
- W1990408976 sameAs 1990408976 @default.
- W1990408976 citedByCount "1" @default.
- W1990408976 crossrefType "book-chapter" @default.
- W1990408976 hasAuthorship W1990408976A5053896327 @default.
- W1990408976 hasAuthorship W1990408976A5068061303 @default.
- W1990408976 hasConcept C108204754 @default.
- W1990408976 hasConcept C142724271 @default.
- W1990408976 hasConcept C155647269 @default.
- W1990408976 hasConcept C161790260 @default.
- W1990408976 hasConcept C178790620 @default.
- W1990408976 hasConcept C185592680 @default.
- W1990408976 hasConcept C204787440 @default.
- W1990408976 hasConcept C2775999725 @default.
- W1990408976 hasConcept C2776910235 @default.
- W1990408976 hasConcept C2777712214 @default.
- W1990408976 hasConcept C2779240715 @default.
- W1990408976 hasConcept C2779440280 @default.
- W1990408976 hasConcept C2779664164 @default.
- W1990408976 hasConcept C2779825165 @default.
- W1990408976 hasConcept C2780378348 @default.
- W1990408976 hasConcept C2780471494 @default.
- W1990408976 hasConcept C50027330 @default.
- W1990408976 hasConcept C71924100 @default.
- W1990408976 hasConceptScore W1990408976C108204754 @default.
- W1990408976 hasConceptScore W1990408976C142724271 @default.
- W1990408976 hasConceptScore W1990408976C155647269 @default.
- W1990408976 hasConceptScore W1990408976C161790260 @default.
- W1990408976 hasConceptScore W1990408976C178790620 @default.
- W1990408976 hasConceptScore W1990408976C185592680 @default.
- W1990408976 hasConceptScore W1990408976C204787440 @default.
- W1990408976 hasConceptScore W1990408976C2775999725 @default.
- W1990408976 hasConceptScore W1990408976C2776910235 @default.
- W1990408976 hasConceptScore W1990408976C2777712214 @default.
- W1990408976 hasConceptScore W1990408976C2779240715 @default.
- W1990408976 hasConceptScore W1990408976C2779440280 @default.
- W1990408976 hasConceptScore W1990408976C2779664164 @default.
- W1990408976 hasConceptScore W1990408976C2779825165 @default.
- W1990408976 hasConceptScore W1990408976C2780378348 @default.
- W1990408976 hasConceptScore W1990408976C2780471494 @default.
- W1990408976 hasConceptScore W1990408976C50027330 @default.
- W1990408976 hasConceptScore W1990408976C71924100 @default.
- W1990408976 hasLocation W19904089761 @default.
- W1990408976 hasOpenAccess W1990408976 @default.
- W1990408976 hasPrimaryLocation W19904089761 @default.
- W1990408976 isParatext "false" @default.
- W1990408976 isRetracted "false" @default.
- W1990408976 magId "1990408976" @default.
- W1990408976 workType "book-chapter" @default.