3,4-Dihydro-benz[1,3]oxazine Derivatives from 2-Acyl(or aroyl)-cyanatobenzenes
摘要:
3,4-Dihydro-2H-benz[1,3]oxazin-2-ones 3 are obtained from 2-acyl(or aroyl)-cyanatobenzenes 2 and anisole. The reaction proceeds under Friedel-Crafts conditions via DIMROTH rearrangement. Compounds 2, dissolved in diethyl ether, react with 1 in the presence of finely powdered KOH at ambient temperature leading to 8. The structure of 8b is confirmed by X-ray structure analysis. (Z) - 4 -Ethylidene - 3,4-dihydro-2H-benz [1,3] oxazin-2-one 9 is formed upon treatment of 2-cyanatopropiophenone 2b with diluted hydrochloric acid. The ethylene derivative 5 is obtained from 4 upon reaction with cyanogen bromide/triethyl amine.
3,4-Dihydro-benz[1,3]oxazine Derivatives from 2-Acyl(or aroyl)-cyanatobenzenes
摘要:
3,4-Dihydro-2H-benz[1,3]oxazin-2-ones 3 are obtained from 2-acyl(or aroyl)-cyanatobenzenes 2 and anisole. The reaction proceeds under Friedel-Crafts conditions via DIMROTH rearrangement. Compounds 2, dissolved in diethyl ether, react with 1 in the presence of finely powdered KOH at ambient temperature leading to 8. The structure of 8b is confirmed by X-ray structure analysis. (Z) - 4 -Ethylidene - 3,4-dihydro-2H-benz [1,3] oxazin-2-one 9 is formed upon treatment of 2-cyanatopropiophenone 2b with diluted hydrochloric acid. The ethylene derivative 5 is obtained from 4 upon reaction with cyanogen bromide/triethyl amine.
[EN] CYANIC ACID ESTER COMPOUND, METHOD FOR PRODUCING SAME, RESIN COMPOSITION, CURED PRODUCT, SINGLE-LAYER RESIN SHEET, MULTILAYER RESIN SHEET, PREPREG, METAL FOIL-CLAD LAMINATE, PRINTED WIRING BOARD, SEALING MATERIAL, FIBER-REINFORCED COMPOSITE MATERIAL, ADHESIVE AND SEMICONDUCTOR DEVICE<br/>[FR] COMPOSÉ ESTER D'ACIDE CYANIQUE, PROCÉDÉ DE PRODUCTION CORRESPONDANT, COMPOSITION DE RÉSINE, PRODUIT DURCI, FEUILLE DE RÉSINE MONOCOUCHE, FEUILLE DE RÉSINE MULTICOUCHE, PRÉIMPRÉGNÉ, STRATIFIÉ PLAQUÉ PAR UNE FEUILLE MÉTALLIQUE, CARTE DE CIRCUIT IMPRIMÉ, MATÉRIAU D'ÉTANCHÉITÉ, MATÉRIAU COMPOSITE RENFORCÉ PAR DES FIBRES, ADHÉSIF ET DISPOSITIF SEMI-CONDUCTEUR<br/>[JA] シアン酸エステル化合物及びその製造方法、樹脂組成物、硬化物、単層樹脂シート、積層樹脂シート、プリプレグ、金属箔張積層板、プリント配線板、封止用材料、繊維強化複合材料、接着剤、並びに半導体装置