NICHOLAS E. S.; PHEIPS D. J., J. CHEM. AND ENG. DATA, 1980, 25, NO 1, 89-90
作者:NICHOLAS E. S.、 PHEIPS D. J.
DOI:——
日期:——
Synthesis of isomeric methyl- and dimethyl-substituted 4-benzylidene-2-phenyloxazolin-5-ones and ring-opened derivatives
作者:Everton S. Nicholas、David J. Phelps
DOI:10.1021/je60084a033
日期:1980.1
Catalytic aza-Wittig Reaction of Acid Anhydride for the Synthesis of 4<i>H</i>-Benzo[<i>d</i>][1,3]oxazin-4-ones and 4-Benzylidene-2-aryloxazol-5(4<i>H</i>)-ones
copper-catalyzed reduction of phosphine oxide was used and found effective for this transformation. Additionally, the one-pot catalyticaza-Wittig reaction of carboxylic acids was achieved. Furthermore, NMR experiments and Hammett plot recorded the process of catalyticaza-Wittig reaction of anhydride, which provides direct proof that the copper-catalyzed reduction of waste phosphine oxide is the key step
与醛,酮,酰胺和酯的aza-Wittig反应相比,酸酐的aza-Wittig反应总是被忽略,这应该是Wittig反应的重要组成部分。在这里,酸酐的aza-Wittig反应和酸酐的aza-Wittig催化反应均以高收率开发,这为合成4 H-苯并[ d ] [1,3]恶嗪-4-酮和4-亚苄基-2-芳基恶唑-5(4 H)-那些。使用了铜催化的氧化膦还原的策略,发现该策略对这种转化有效。另外,实现了羧酸的一锅催化的氮杂-维蒂希反应。此外,NMR实验和Hammett曲线记录了酸酐的催化氮杂-维蒂希反应过程,这直接证明了铜催化的废氧化膦的还原是该转化过程中的关键步骤。