Concise Synthesis and Transannular Inverse Electron Demand Diels−Alder Reaction of [3](3,6)Pyridazino[3](1,3)indolophane. Rapid Access to a Pentacyclic Indoloid System
作者:Graham J. Bodwell、Jiang Li
DOI:10.1021/ol017014+
日期:2002.1.1
[reaction: see text] The title compound was synthesized concisely from indole. A 2-fold sequential hydroboration/Suzuki-Miyaura cross-coupling was employed to generate the cyclophane. When heated in N,N-diethylaniline, it underwent a transannular inverse electron demand Diels-Alder (IEDDA) reaction to form a pentacyclic product, which appears to be well suited as a precursor to a variety of indole alkaloids
[反应:见正文]标题化合物由吲哚简洁地合成。2倍连续硼氢化/ Suzuki-Miyaura交叉偶联用于产生环烷。当在N,N-二乙基苯胺中加热时,它会发生跨环电子逆需求Diels-Alder(IEDDA)反应,形成五环产物,该产物似乎非常适合作为多种吲哚生物碱(如士的宁)的前体。