Reaction of malonates with camphoranile synthesis of 4-hydroxy-2-pyridones attached to the bornane ring system
作者:Stanislav Kafka、Rudolf Aigner、Thomas Kappe
DOI:10.1002/jhet.5570430444
日期:2006.7
4-hydroxy-2(1H)-pyridones attached to bornane ring system 6a-c in good yields. Less satisfactory yields were obtained with the diethyl malonate 5b. The reaction of an excess of diethyl malonate 5 itself with 3b yields the pyrono derivative 7, which can readily be degraded via the acetyl derivative 8 to the basic structure 9.
樟脑腈3a,b与“魔术丙二酸酯”(双-2,4,6-三氯苯基丙二酸酯)4a,b的反应导致4-羟基-2(1 H)-吡啶酮以良好的收率连接在硼烷环系统6a-c上。 。用丙二酸二乙酯5b不能获得令人满意的产率。过量的丙二酸二乙酯5本身与3b的反应产生了吡咯衍生物7,其可以容易地通过乙酰基衍生物8降解为基本结构9。