Triflic Acid-Mediated Rearrangements of 3-Methoxy-8-oxabicyclo[3.2.1]octa-3,6-dien-2-ones: Synthesis of Methoxytropolones and Furans
作者:Yvonne D. Williams、Christine Meck、Noushad Mohd、Ryan P. Murelli
DOI:10.1021/jo401617r
日期:2013.12.6
because of their known biological activity and established value in the synthesis of α-hydroxytropolones. Upon treatment with triflic acid, a series of 3-methoxy-8-oxabicyclo[3.2.1]octa-3,6-dien-2-ones rearrange rapidly and cleanly to form methoxytropolones. Interestingly, bicycles that are derived from dimethyl acetylenedicarboxylate (R2 = R3 = CO2Me) instead form furans as the major product.
甲氧基托酚酮是用于治疗开发的有用支架,因为其已知的生物活性和在 α-羟基托酚酮合成中的确定价值。用三氟甲磺酸处理后,一系列 3-甲氧基-8-氧杂二环[3.2.1]八-3,6-二烯-2-酮快速而干净地重排,形成甲氧基托酚酮。有趣的是,衍生自乙炔二甲酸二甲酯(R 2 = R 3 = CO 2 Me)的自行车反而形成呋喃作为主要产物。