The reaction of keto-stabilized sulphonium and arsonium ylides with α-chlorooximes
作者:P. Bravo、G. Gaudiano、P.P. Ponti、C. Ticozzi
DOI:10.1016/s0040-4020(01)93832-3
日期:1972.1
The reaction of α-chlorooximes or the isomeric nitrosochlorides with keto-stabilized dimethylsulphonium or triphenylarsonium ylides affords trans-5-acyl-Δ2-isoxazolines (VIIa-m) in good yields. The NOCI adducts of ethylpropenyl ether and ethylstyryl ether on reaction with dimethylsulphonium phenacylide lead directly to the corresponding 3-substituted-5-benzoylisoxazo]es. Dimethylsulphonium carbethoxymethylide
α-chlorooximes或异构nitrosochlorides与酮-稳定dimethylsulphonium或triphenylarsonium叶立德,得到反应反式-5-酰基-Δ 2以良好的收率-isoxazolines(VIIA-M)。乙基丙烯基醚和乙基苯乙烯基醚的NOCI加合物在与二甲基砜苯乙酰胺反应时直接生成相应的3-取代的5-苯甲酰基异恶唑。与2-氯-2-苯基丙酮肟反应的二甲基磺酸甲乙氧基甲基酯提供β-乙酰肉桂酸乙酯的肟,而与2-氯环辛酮肟反应生成硫醚IXd。