共查询到20条相似文献,搜索用时 15 毫秒
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A Facile Method for the Synthesis of Benzoxazoles The preparation of benzoxazoles by a facile one-pot reaction is reported. The reaction of carboxylic acids with 2-chloro-N-methyl-Δ1-pyrrolinium chloride in an excess of N-methyl-2-pyrrolidone afforded carboxylic acid chlorides which were converted subsequently to their 2-hydroxyanilides by addition of 2-aminophenols. Cyclization of the 2-hydroxy-anilides at elevated temperatures furnished the benzoxazoles in high yield and purity. 相似文献
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Barbara Grüttner 《Fresenius' Journal of Analytical Chemistry》1957,155(1):75
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E. L. Forster 《Monatshefte für Chemie / Chemical Monthly》1954,85(5):1104-1109
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A New Facile Method for the Dealkylation of Phosphonic and Phosphinic Acid Esters The synthesis of phosphonic and phosphinic acid esters of the type is realized by reaction of dialkylphosphonates and O-alkylphosphinates with chlorotrimethylsilane in the presence of catalytical amounts of NH4Cl and hexamethyldisilazane (HMDZ). 相似文献
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Hildegard Telschow 《Fresenius' Journal of Analytical Chemistry》1956,149(3):231
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Ursula Baumann 《Fresenius' Journal of Analytical Chemistry》1959,169(4):307
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