First Total Syntheses of the Phytotoxins Solanapyrones D and E via the Domino Michael Protocol
作者:Hisahiro Hagiwara、Katsuhiro Kobayashi、Shigeki Miya、Takashi Hoshi、Toshio Suzuki、Masayoshi Ando、Tetsuji Okamoto、Masaki Kobayashi、Isao Yamamoto、Satoru Ohtsubo、Michiharu Kato、Hisashi Uda
DOI:10.1021/jo0163602
日期:2002.8.1
phytotoxins solanapyrones D (1) and E (2) have been synthesized from the decalone prepared by the domino Michael reaction of the kinetic enolate of optically pure acetylcyclohexene with methyl crotonate. The decalone was transformed into a solanapyrone core by equilibration into thermodynamically stable trans-decalone (11), dehydroxylation, and dehydration. Condensation of a methyl acetoacetate equivalent
植物毒素solanapyrones D(1)和E(2)是通过光学上纯净的乙酰基环己烯与巴豆酸甲酯的动力学烯醇酸酯的多米诺米歇尔反应制备的十萘嵌苯醚合成的。通过平衡成热力学稳定的反式十氢化萘(11),脱羟基和脱水,将十氢化萘转化为茄那隆核心。乙酰乙酸甲酯等价物的缩合,然后环化,安装了吡喃酮部分。通过Pummerer相关反应将甲酰基或羟甲基单元引入吡喃酮环,可得到茄吡喃酮D(1)和E(2)。