Conversion of 2-Sulfinylated 2-Alkenoate Esters to (2<i>E</i>,4<i>E</i>)-2,4-Alkadienoate Esters by Pyrolysis
作者:Rikuhei Tanikaga、Yoshihito Nozaki、Masaharu Nishida、Aritsune Kaji
DOI:10.1246/bcsj.57.729
日期:1984.3
by ethyl (2E)-4-hydroxy-2-alkenoates. Ethyl 2-cycloalkylidene-2-phenylsulfinylacetates were found to be more susceptible to pyrolysis. The enoate esters (2) undergo migration of their carbon-carbon double bond and then [2,3]sigmatropic rearrangement to benzene-sulfenate esters, followed by thermolytic extrusion of a benzenesulfenic acid probably via ethyl (2E)-4-phenyl-sulfinyl-2-alkenoates to afford
已经研究了由醛和 2-苯基亚磺酰基乙酸乙酯制备的 (2E)-2-苯基亚磺酰基-2-链烯酸乙酯 (E-2) 的热反应。E-2 或其 Z-异构体在二甲苯中的回流导致形成 (2E,4E)-2,4-链二烯酸乙酯和 (2E)-4-羟基-2-链烯酸乙酯。发现 2-亚环烷基-2-苯基亚磺酰基乙酸乙酯对热解更敏感。烯酸酯 (2) 经历其碳-碳双键的迁移,然后 [2,3] σ 重排为苯-次磺酸酯,随后可能通过乙基 (2E)-4-苯基-亚磺酰基热解挤出苯次磺酸-2-链烯酸酯得到(2E,4E)-2,4-链二烯酸乙酯。