Synthesis of Altenuene Backbones through Iodine(III)-Participated Umpolung Diesterification and Insights into the General [1,5]-H Shift in <i>para</i>-Dearomatization of Phenols via Quantum Chemical Calculations
1′-biphenyl]-2-carboxylic acids, a series of polycyclic compounds possessing an altenuene backbone were obtained in moderate to good yields. The Umpolung diesterification reaction was completed under mild reaction conditions without an additional nucleophilic reagent. This work offers a concise method for the synthesis of diverse natural altenuene analogues. The mechanism was proposed, and the [1,5]-H shift was studied
leading to a range of fluorocyclohexa-dienones with yields of up to 94%. This reaction provides a convenient method to synthesize fluorine-containing dehydroaltenusin analogs under mild conditions, and without expensive reagents. These analogs have potential application as inhibitors of DNA polymerase.
我们开发了一种使用化学计量的间氯过苯甲酸 ( m -CPBA) 作为氧化剂和氟化氢吡啶 (pyr·HF) 作为氟化物源的方法,并使用催化量的碘苯 (PhI) 对苯酚进行环化和氟化-脱芳构化,领先到一系列氟环己二酮,产率高达 94%。该反应提供了一种在温和条件下合成含氟脱氢黄曲霉素类似物且无需昂贵试剂的简便方法。这些类似物具有作为 DNA 聚合酶抑制剂的潜在应用。
Polyhalogenation-Facilitated Spirolactonization at the <i>meta</i>-Position of Phenols
good understanding of the mechanism, the increase in number of bromine atoms was inferred rationally from the spirolactonization process, assisted by DFT calculations and high-resolution mass spectrometry. Mechanistic experiments suggest that the formation of a stable carbocation intermediate plays a great role in the migration of oxygen to spirolactonization.