Researches on acetylenic compounds. Part LXVII. Base-catalysed isomerisation of hepta-2,4-diynoic, hepta-2,5-diynoic, hepta-4,5-dien-2-ynoic, and hepta-2,3-dien-5-ynoic acids
作者:R. J. Bushby、G. H. Whitham
DOI:10.1039/j29700000563
日期:——
at 65° hepta-2,4-diynoic acid is isomerised to hepta-3,5-diynoic acid. A number of possible intermediates in this isomerisation: hepta-4,5-dien-2-ynoic, hepta-2,5-diynoic, and hepta-2,3-dien-5-ynoic acid have been synthesised and shown to isomerise to hepta-3,5-diynoic acid at rates which progressively increase in the order given. From a kinetic and spectroscopic study of the isomerisations it is concluded
在65°的氢氧化钠水溶液(1 N)中,庚2,4-二羟己酸异构化为庚3,5-二羟己酸。在这种异构化过程中,已经合成了许多可能的中间体:庚4,5-二烯-2-炔酸,庚2,5-二烯酸和庚2,3-二烯-5-炔酸并显示异构化为庚3,5-二壬酸的速率按给定顺序逐渐增加。从异构化反应的动力学和光谱学研究得出的结论是,转化的主要途径涉及序列hepta-2,4-diynoic acid→hepta-4,5-dien-2-ynoic acid→hepta-2,3, 4,5-丁烯酸→3,5-己二酸庚酯。