A Regioselective Lithiation of 1-Methoxymethoxyindole at the 2-Position and Its Application for the Synthesis of 2-Substituted Indoles
摘要:
A regioselective lithiation of 1-methoxymethoxyindole at the 2-position was achieved with n-BuLi at 0-degrees-C. Subsequent treatment with electrophiles afforded 2-substituted 1-methoxymethoxyindoles, which were readily converted to 2-substituted indoles.
Regio‐ and Enantioselective (3+3) Cycloaddition of Nitrones with 2‐Indolylmethanols Enabled by Cooperative Organocatalysis
作者:Tian‐Zhen Li、Si‐Jia Liu、Yu‐Wen Sun、Shuang Deng、Wei Tan、Yinchun Jiao、Yu‐Chen Zhang、Feng Shi
DOI:10.1002/anie.202011267
日期:2021.2
regiospecificity. This approach enabled not only the first organocatalytic asymmetric (3+3) cycloaddition of nitrones but also the first C3‐nucleophilic asymmetric (3+3) cycloaddition of 2‐indolylmethanols. More importantly, theoretical calculations elucidated the role of the cocatalyst HFIP in helping CPA control the reactivity and enantioselectivity of the reaction, demonstrating a new mode of cooperative catalysis
Cu(OAc)<sub>2</sub>-Triggered Cascade Reaction of Malonate-Tethered Acyl Oximes with Indoles, Indole-2-alcohols, and Indole-2-carboxamides
作者:Peng-Fei Mao、Li-Jin Zhou、An-Qi Zheng、Chun-Bao Miao、Hai-Tao Yang
DOI:10.1021/acs.orglett.9b00849
日期:2019.5.3
indole-2-carboxmides provides facile access to polysubstituted 3-pyrrolin-2-ones. The reaction features the generation of two adjacent electrophilic centers at the same time as cyclization to lactam. The subsequent double addition with nucleophiles followed by oxidation realizes the difunctionalization of the imine sp2-carbon and the adjacent α-sp3-carbon.
Heterogeneous Palladium Catalysts Applied to the Synthesis of 2- and 2,3-Functionalised Indoles
作者:Laurent Djakovitch、Véronique Dufaud、Rabah Zaidi
DOI:10.1002/adsc.200505283
日期:2006.4
Heterogeneouspalladiumcatalysts ([Pd(NH3)4]2+/NaY and [Pd]/SBA-15) were applied to the synthesis of 2-functionalised indoles, giving generally high conversions and selectivities (>89% yield) using only 1 mol % [Pd]-catalyst under standard reaction conditions (polar solvent, 80 °C). For the synthesis of 2,3-functionalisedindoles by cross-coupling arylation, the [Pd]/SBA-15 catalyst was found to be
Cu(OAc)<sub>2</sub>-Promoted Oxidative Cross-Dehydrogenative Coupling Reaction of α-Acylmethyl Malonates with Indole Derivatives to Access 3-Functionalized Indoles and Polycyclic Indoles
A Cu(OAc)2-promoted oxidative cross-dehydrogenative coupling reaction of α-acylmethyl malonates with indole derivatives was developed. In the case of indoles, the regioselective coupling products were formed through a sequential dehydrogenation–addition–dehydrogenation process. When a second nucleophilic center was located in the 2-position of indoles, further successive nucleophilic cyclization occurred
Described is a concise total synthesis of (-)-ambiguine P, a cycloheptane-containing member of the hapalindole alkaloids. The challenging pentacyclic framework of the natural product was assembled rapidly via a [4 + 3] cycloaddition reaction-inspired strategy, and the tertiary hydroxy group was introduced by an NBS-mediated bromination-nucleophilic substitution sequence.
描述了 (-)-ambiguine P 的简明全合成,它是 hapalindole 生物碱的一种含环庚烷的成员。通过受[4 + 3]环加成反应启发的策略快速组装天然产物的具有挑战性的五环骨架,并通过NBS介导的溴化-亲核取代序列引入叔羟基。