30213-79-7Relevant articles and documents
Preparation method of isoxazole derivative
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Paragraph 0131-0135, (2019/12/02)
The invention relates to a preparation method of an isoxazole derivative, which comprises the following steps of mixing an propargyl alcohol derivative, a halogen source, an acid and a solvent, and heating to react; adding the hydroxylamine into the react
Design, synthesis, and insecticidal evaluation of new benzoylureas containing isoxazoline and isoxazole group
Sun, Ranfeng,Li, Yongqiang,Xiong, Lixia,Liu, Yuxiu,Wang, Qingmin
, p. 4851 - 4859 (2011/12/04)
Twenty-two new benzoylphenylureas containing isoxazoline and the isoxazole group were designed and synthesized, and their structures were characterized by 1H NMR and elemental analysis (or HRMS). The larvicidal activities against Oriental armyw
Efficient and regioselective one-pot synthesis of 3-substituted and 3,5-disubstituted isoxazoles
Tang, Shibing,He, Jinmei,Sun, Yongquan,He, Liuer,She, Xuegong
supporting information; experimental part, p. 3982 - 3985 (2009/12/03)
(Figure Presented) A series of 3-substituted and 3,5-disubstituted isoxazoles have been efficiently synthesized in moderate to excellent yields by the reaction of N-hydroxyl-4-toluenesulfonamide with α,β-unsaturated aldehydes/ketones. This novel strategy is associated with readily available starting materials, mild conditions, high regioselectivity, and wide scope.
Preparation of isoxazol(in)yl substituted selenides and their further deselenenylation reaction to synthesize 3,5-disubstituted isoxazoles
Xu, Wei Ming,Tang,Huang, Xian
, p. 501 - 506 (2007/10/03)
We report a mild 1,3-dipolar cycloaddition protocol for the preparation of 3-aryl-5-phenylselenomethyl isoxazoles and isoxazolines regioselectively. The former was further reacted with LDA and electrophilic substrates followed by selenoxide syn-eliminatio
Reactivity of p-phenyl substituted β-enamino compounds using k- 10/ultrasound. II [1]. Synthesis of isoxazoles and 5-isoxazolones
Valduga, Claudete J.,Santis, Denise B.,Braibante, Hugo S.,Braibante, Mara E. F.
, p. 505 - 508 (2007/10/03)
The condensation of 4-phenyl substituted β-enamino ketones 1a-d and β- enamino esters 5a-d with hydroxylamine hydrochloride using K-10 as the solid support under sonication was studied to evaluate the formation of isoxazole and 5-isoxazolone rings from β-enamino compounds with a substituted aromatic ring. Isoxazoles 2a-c, 3c-d and 5-isoxazolones 6a-c and 7a-d were obtained. The use of K-10/ultrasound in this reaction furnished novel results in some cases.
Derivatization of 5-Halogeno-4-(4-nitrophenyl)isoxazoles
Lin, Shaw-Tao,Yang, Fu-Mey
, p. 1626 - 1635 (2007/10/02)
Treatment of 5-halogeno-3-(4-nitrophenyl)isoxazoles with various reagents demonstrated competitive substitution between the hydrogens of the arene and the halogens of the isoxazole.When an alkyllithium or Grignard reagents was used, alkylation took place at C-3 of the phenyl ring.For alkyl amines and alkoxides as reagents, these bases underwent substitution of halide.Weaker bases (aromatic amines) were observed to be inert towards the title compounds.
Reactions with Organophosphorus Compounds, XLVI. Reactivity Umpolung of 1,3-Dioxo Compounds through Introduction of a Triphenylphosphonio Group. - Regioselective Syntheses of Isoxazoles and Pyrazoles from (2,4-Dioxoalkyl)triphenylphosphonium Salts
Oehler, Elisabeth,Zbiral, Erich
, p. 2852 - 2867 (2007/10/02)
Phosphonium salts 2 and 6, upon deprotonation with BuLi and subsequent reaction with acyl halides, yield the γ-acyl derivatives 3 and 7, respectively, which on treatment with hydrochloric acid afford the corresponding (dioxoalkyl)phosphonium salts 4 and 8.Isoxazole derivatives 9 and 10 are formed regioselectivly from 4 and 8 with NH2OH*HCl, while with R-NH-NH2*HCl (R = H or C6H5) the pyrazole-containing phosphonium salts 14 and 15 are obtained in an analogous reaction.In each case the direction of cyclisation is different to the reactions of the corresponding non-phosphorus substituted 1,3-dioxo compounds.On treatment with aqueous NaOH 9 and 10 are cleaved to triphenylphosphane oxide and isoxazoles 11 and 12, while 14 and 15 yield the pyrazoles 16 and 17.Wittig reaction of 9a or 14a with aldehydes or ketones leads to the isoxazole olefins 13 or the pyrazole olefins 18, respectively.