本文描述了一种空前的路易斯酸,其通过炔丙基炔醇与2-乙烯基苯酚的环加成反应,催化了有价值的3,4-二氢-2 H -2,4-甲烷二甲基苯并没有保护性地进行了高效合成。该环加成方案可耐受多种官能团,以令人满意的收率提供实用,通用且经济实惠的途径来获得新型的有吸引力的桥环产品。与报道的桥环骨架合成反应条件相比,目前的反应条件是中性,温和且没有任何添加剂。
An unprecedented Lewisacidcatalyzed, high-efficiency synthesis of valuable 2-(quinolin-2-yl)prop-2-en-1-ones via dehydrogenative coupling of propargylic alkynols with quinoline N-oxides is described. This protocol, which tolerates a broad range of functional groups, provides a straightforward pathway to the products 2-(quinolin-2-yl)prop-2-en-1-one scaffolds in satisfactory yields. The conversion
A new method for the efficient synthesis of hexahydro-1H-fluorene and octahydrobenzo[a]azulene derivatives through a ring-expansion strategy is reported. With an appropriate combination of thulium(III) trifluoromethanesulfonate and 13X molecular sieves, a range of unsaturated polycycliccompounds were obtained in good yields. Mechanism studies reveal that the reaction is more likely to undergo Meyer–Schuster
An unprecedented Lewisacidcatalyzed [4 + 3] cycloaddition reaction is described that provides a straightforward route to polycyclic products containing an imine-based indole azepine scaffold, starting from readily available internal tertiary alkynols and azides. This cycloaddition protocol provides efficient and atom-economical access to a new class of fascinating imine-containing products in satisfactory
An unprecedented copper(II) trifluoromethanesulfonate‐catalyzed [4+2] cascade annulation of propargylic alcohols with benzo[d]isoxazoles proceeds through a sequential ring opening/Meyer–Schuster rearrangement/intermolecular cyclization. This protocol, which tolerates a broad variety of functional groups, offers a versatile, modular and atom‐economical access to a new class of fascinating quinoline
前所未有的三氟甲磺酸铜(II)催化的炔丙醇与苯并[ d ]异恶唑的级联环化反应通过顺序开环/ Meyer-Schuster重排/分子间环化来进行。该方案可耐受多种官能团,在温和条件下以高收率提供了一种通用的,模块化的,原子经济的途径来获得新型迷人的喹啉衍生物。转换可以有效地放大到克级,从而突出了此方法的综合效用。
Lewis Acid‐Catalyzed Annulation of Propargylic Alcohols with (
<i>Z</i>
)‐2‐Styryl‐1
<i>H</i>
‐Indoles
A novel copper(II) trifluoromethanesulfonate‐catalyzed intermolecular cascade annulation strategy for the construction of a great variety of pentacyclic compounds possessing valuable carbazole fragments was developed employing propargylic alcohols and (Z)‐2‐styryl‐1H‐indoles as the initial substrates. This protocol, which entails a sequential Meyer‐Schuster rearrangement/isomerization/‐cyclization