从理论上和实验上研究了环状 1,3-二酮与原甲酸三烷基酯和原乙酸三甲酯在没有活化剂的情况下的反应机理。反应通过反应物的电离形式的 CC 偶联进行,得到二烷基缩醛,其进一步转化为乙烯基醚。后者与原酸酯的反应提供醛(酮)。相关的 2-乙酰环戊酮在氩气下与原乙酸三甲酯反应形成甲基烯醇醚的混合物,而在空气氧存在下形成戊二酸二甲酯。
ENSLEY, H. E.;BALAKRISHNAN, P.;UGARKAR, B., TETRAHEDRON LETT., 1983, 24, N 47, 5189-5192
作者:ENSLEY, H. E.、BALAKRISHNAN, P.、UGARKAR, B.
DOI:——
日期:——
Activator-free reactions of carboxylic ortho esters with cyclic β-diketones
作者:N. N. Balaneva、O. P. Shestak、V. L. Novikov、V. P. Glazunov
DOI:10.1007/s11172-021-3255-7
日期:2021.8
The reaction mechanisms of cyclic 1,3-diketones with trialkyl orthoformates and trimethyl orthoacetate in the absence of activators were theoretically and experimentally studied. The reactions proceed via C-C-coupling of the ionized forms of the reactants giving dialkyl acetals, which further transform into vinyl ethers. The reactions of the latter with ortho esters afford aldehydes (ketones). Related
从理论上和实验上研究了环状 1,3-二酮与原甲酸三烷基酯和原乙酸三甲酯在没有活化剂的情况下的反应机理。反应通过反应物的电离形式的 CC 偶联进行,得到二烷基缩醛,其进一步转化为乙烯基醚。后者与原酸酯的反应提供醛(酮)。相关的 2-乙酰环戊酮在氩气下与原乙酸三甲酯反应形成甲基烯醇醚的混合物,而在空气氧存在下形成戊二酸二甲酯。
Reaction of singlet oxygen with β-alkoxyenones
作者:Harry E. Ensley、P. Balakrishnan、B. Ugarkar
DOI:10.1016/s0040-4039(00)88393-8
日期:1983.1
Single oxygen reacts with 1-acetyl-2-methoxycyclopentene () to give the unsaturated hemiperketal . decomposes by an intermolecular oxygen atom transfer to give the epoxy-β-diketone . Several β-alkoxyenones which are held in the s- conformation failed to react with singletoxygen.