Total Synthesis of Tropoloisoquinolines: Imerubrine, Isoimerubrine, and Grandirubrine<sup>1</sup>
作者:Jae Chol Lee、Jin Kun Cha
DOI:10.1021/ja0101072
日期:2001.4.1
ready access to the tropoloisoquinoline alkaloids imerubrine (1), grandirubrine (2), and isoimerubrine (3) is delineated and features sequential application of the intramolecular Diels-Alder reaction of an acetylene-tethered oxazole and the [4 + 3] cycloaddition of an oxyallyl. A regioselective synthesis of 1 was achieved by stereo- and regioselective oxidation of an 8-oxabicyclo[3.2.1]oct-6-en-3-one cycloadduct
描述了对原异喹啉生物碱 imerubrine (1)、grandirubrine (2) 和 isoimerubrine (3) 的统一、方便的访问,并以乙炔连接的恶唑和 [4 + 3] 的分子内 Diels-Alder 反应的顺序应用为特征氧烯丙基的环加成。1 的区域选择性合成是通过使用 Moriarty 方法对 8-氧杂双环 [3.2.1]oct-6-en-3-one 环加合物进行立体和区域选择性氧化来实现的。这种环加成后官能化补充了α-烷氧基取代的氧烯丙基的合成效用,从而拓宽了氧烯丙基[4+3]环加成反应的范围。