Pd(II)-Catalyzed Synthesis of Bicyclo[3.2.1] Lactones <i>via</i> Tandem Intramolecular β-C(sp<sup>3</sup>)–H Olefination and Lactonization of Free Carboxylic Acids
作者:Martin Tomanik、Shaoqun Qian、Jin-Quan Yu
DOI:10.1021/jacs.2c04195
日期:2022.7.13
shows excellent functional group compatibility, and can be extended to the preparation of the related seven-membered bicyclo[4.2.1] lactones. Additionally, we demonstrate the synthetic potential of this annulation by constructing the 6,6,5-tricyclic lactone core structure of the meroterpenoid cochlactone A. We anticipate that this compelling reaction may provide a novel synthetic disconnection that
双环[3.2.1]内酯是在许多生物活性天然产物中发现的化学支架。在此,我们详细介绍了新型钯(II)催化串联分子内β-C(sp 3)–H 烯化和内酯化反应,将具有束缚烯烃的直链羧酸快速转化为双环[3.2.1]内酯基序。该转化具有广泛的底物范围,表现出优异的官能团兼容性,并且可以扩展到相关七元双环[4.2.1]内酯的制备。此外,我们通过构建类萜内酯 A 的 6,6,5-三环内酯核心结构,展示了这种环化的合成潜力。我们预计,这种引人注目的反应可能提供一种新颖的合成断开,可广泛应用于制备多种具有生物活性的天然产物。