The Stereochemistry of the Reformatsky Reaction of Methyl 4-Bromo-3-methylbut-2-enoate with β-Cyclocitral and Related Compounds
作者:R. N. Gedye、Parkash Arora、A. H. Khalil
DOI:10.1139/v75-271
日期:1975.7.1
the δ-lactone of 5-hydroxy-3-methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-pentenoic acid as the main product, indicating an E to Z inversion during the Reformatsky reaction. Similar results were obtained in the Reformatsky reactions of the Z- and E-bromo-esters with benzaldehyde and cyclohexenecarboxaldehyde. Here hydrolysis of the Reformatsky product gave, in each case, the corresponding Z-2,E-4-acids
Z- 和 E-4-bromo-3-methylbut-2-enoate 与 β-环柠檬醛在锌存在下反应生成 5-羟基-3-甲基-5-(2,6, 6-trimethyl-1-cyclohexen-1-yl)-2-pentenoic acid 作为主要产物,表明在 Reformatsky 反应期间发生了 E 到 Z 的反转。在 Z-和 E-溴-酯与苯甲醛和环己烯甲醛的 Reformatsky 反应中获得了类似的结果。在此,Reformatsky 产物的水解在每种情况下都得到相应的 Z-2,E-4-酸作为主要产物,表明形成了 δ-内酯作为中间体。还描述了使用 Wittig 反应合成 Z-和 E-β-亚亚乙基乙酸和相应的环去甲基类似物。