75633-01-1

Upstream product

• 25172-54-7 1-(2-hydroxy-5-methylphenyl)ethan-1-one oxime 
• 1450-72-2 5-methyl-2-hydroxyacetophenone 

Relevant academic research and scientific papers

Benzisoxazole 2-oxides as novel UV absorbers and photooxidation inhibitors

Compounds with strong absorptions in the ultraviolet (UV) region of the spectrum, particularly the UVA and UVB, have seen much interest as UV screeners or absorbers in a wide variety of commercial products. A series of benzisoxazole 2-oxides have been synthesized and characterized by UV-vis spectroscopy. A number of derivatives have been shown to posses moderate to strong molar absorption coefficients in the UVB range (ca. 300 nm), the strongest being those derived from benzophenones. Three other derivatives containing additional electron withdrawing groups showed strong molar absorption coefficients in the UVA (ca. 340 nm). Solvent effects on the parent derivatives show changes in the molar absorption coefficients with little changes in the λmax values. Preliminary studies of these compounds as potential additives to prevent photooxidation of polystyrene showed considerable inhibition of polymer degradation with the parent unsubstituted benzisoxazole 2-oxide compounds being the most effective. Copyright 2013 John Wiley & Sons, Ltd. A series of benzisoxazole 2-oxides have been shown to posses moderate to strong molar absorption coefficients in the UVB range (ca. 300 nm) and three others with strong absorptions on the UVA (ca. 340 nm). Solvent effects of the parent derivatives show changes in the molar absorption coefficients with little changes in the λmax values. Preliminary studies of these compounds as potential additives to prevent photooxidation of polystyrene showed considerable inhibition of polymer degradation. Copyright

Synthesis of 1,2-benzisoxazole 2-oxides

(Chemical Equation Presented) A series of 2-hydroxyaryl ketoximes were converted to the corresponding 1,2- benzisoxazole 2-oxides by treatment with iodobenzene diacetate (in acetic acid or methanol) or N-chlorosuccinimide in water. Both methods gave moderate to excellent yields for a variety of substituted oximes under mild conditions within short reaction times. The latter method has the advantages of an aqueous solvent and lack of halogenated organic by-products. Copyright Taylor & Francis Group, LLC.

An efficient synthesis of 3-chloromethyl-1,2-benzisoxazoles via modified Boekelheide rearrangement

An efficient and simple method for the preparation of 3-chloromethyl-1,2- benzisoxazoles by modified Boekelheide rearrangement using phosphorous oxychloride in moderate to good yields has been reported. The scope of the process in terms of synthetic utility and versatility is established.

Sodium perborate: A facile synthesis of 1,2-benzisoxazole 2- oxides

An efficient and convenient methodology has been developed for the conversion of 2-hydroxy phenyl ketoxime to 1,2- benzisoxazole 2-oxide with sodium perborate (SPB) in glacial acetic acid under mild reaction conditions. Interestingly when the reaction was carried out under reflux condition deoximation was observed in quantitative yield.

Preparation of 1,2-Benzisoxazole 2-Oxides

1,2-Benzisoxazole 2-oxides are prepared by the oxidative cyclisation of o-acylphenol oximes, using either lead(IV) acetate or sodium hypochlorite.The scope and limitations of the reaction are discussed.

1,2-Benzisoxazole N-Oxides

1,2-Benzisoxazole N-oxides are prepared by oxidation of o-hydroxyaryl ketoximes with lead tetraacetate.