Stereoselective total syntheses of atrochrysone, torosachrysone and related 3,4-dihydroanthracen-1(2H )-ones
作者:Michael Müller、Kai Lamottke、Erich Löw、Eva Magor-Veenstra、Wolfgang Steglich
DOI:10.1039/b003053h
日期:——
The total synthesis of the pre-anthraquinones atrochrysone 1 and torosachrysone 2 in both enantiomeric forms is described. The synthesis relies on the regioselective Tebbe methylenation of a chiral diester followed by an intramolecular enol ether acylation with N-triflyl-4-(dimethylamino)pyridinium triflate. The resulting 3-methoxycyclohex-2-enone 9 is condensed with suitable orsellinic acid derivatives to yield after deprotection the optically active 3,4-dihydroanthracen-1(2H)-ones 1 and 2. This flexible approach can be used for the synthesis of 13C-labelled compounds and should provide access to a series of analogues.
本文介绍了两种对映体形式的前蒽醌类化合物阿托品酮 1 和托罗品酮 2 的全合成方法。该合成依赖于手性二酯的区域选择性特贝甲烯化,然后与 N-三氟甲基-4-(二甲基氨基)吡啶三酸酯进行分子内烯醚酰化。得到的 3-甲氧基环己-2-烯酮 9 与合适的奥塞林酸衍生物缩合,经脱保护后得到具有光学活性的 3,4-二氢蒽-1(2H)-酮 1 和 2。这种灵活的方法可用于合成 13C 标记的化合物,并可获得一系列类似物。