A General Cp*Co<sup>III</sup>-Catalyzed Intramolecular C−H Activation Approach for the Efficient Total Syntheses of Aromathecin, Protoberberine, and Tylophora Alkaloids
作者:Andreas Lerchen、Tobias Knecht、Maximilian Koy、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/chem.201702648
日期:2017.9.7
Herein, we report a Cp*CoIII‐catalyzed C−H activation approach as the key step to create highly valuable isoquinolones and pyridones as building blocks that can readily be applied in the total syntheses of a variety of aromathecin, protoberberine, and tylophora alkaloids. This particular C−H activation/annulation reaction was achieved with several terminal as well as internal alkyne coupling partners
在此,我们报告Cp * Co III催化的C H活化方法是创建高度有价值的异喹诺酮和吡啶酮的重要步骤,这些异喹啉酮和吡啶酮可以轻松地用于各种芳香族素,原小ber碱和tylophora生物碱的总合成。这种特殊的CH活化/环化反应是通过多个末端以及内部炔烃偶联伙伴实现的,具有广泛的应用范围和出色的官能团耐受性。本文报道的该方案的合成适用性已在两个Topo-I-抑制剂和两个8-氧代小ber碱核心的合成中得到了证明,这些核心可进一步制成四氢小ber碱和原小ber碱生物碱。此外,这些构件也以方便的方式转化为六种不同的tylophora生物碱。
Palladium-Catalyzed Synthesis of Tricyclic Indoles via a N–S Bond Cleavage Strategy
作者:Bo-Sheng Zhang、Fan Wang、Xue-Ya Gou、Ying-Hui Yang、Wan-Yuan Jia、Yong-Min Liang、Xi-Cun Wang、Yuke Li、Zheng-Jun Quan
DOI:10.1021/acs.orglett.1c02715
日期:2021.10.1
bond cleavage with vinyl palladium, thus achieving a highly selective C–N coupling reaction in the Catallani–Lautens reaction system. On the basis of this discovery, a one-step synthesis of highly functionalized tricyclic indole derivatives was realized.
作者:Simone M. Gillbard、Harley Green、Stephen P. Argent、Hon Wai Lam
DOI:10.1039/d1cc01166a
日期:——
Enantioselective nickel-catalyzed reactions of (hetero)arylboronic acids or alkenylboronic acids with substrates containing an alkyne tethered to various acyclic electron-deficient alkenes are described.
Regioselectivity Influences in Platinum-Catalyzed Intramolecular Alkyne O–H and N–H Additions
作者:Jeff P. Costello、Eric M. Ferreira
DOI:10.1021/acs.orglett.9b03557
日期:2019.12.20
The steric and electronic drivers of regioselectivity in platinum-catalyzed intramolecular hydroalkoxylation are elucidated. A branch point is found that divides the process between 5-exo and 6-endo selective processes, and enol ethers can be accessed in good yields for both oxygen heterocycles. The main influence arises from an electronic effect, where the alkyne substituent induces a polarization
Method of using 5-(arysulfonyl)-, 5-(arylsulfanyl)-and 5-(arylsulfanyl)thiazolidine-2,4-diones for inhibition of farnesyl-protein transferase
申请人:American Cyanamid Company
公开号:US20030144301A1
公开(公告)日:2003-07-31
This invention relates to a method of using novel 5-(arylsulfonyl)-, 5-(arylsulfinyl)- and 5-(arylsulfanyl)thiazolidine-2,4-diones of Formula (1), wherein Ar, Ar′, R
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, m and n are as defined in the specification as inhibitors of Ras FPTase, and may be used as an alternative to, or in conjunction with, traditional cancer therapy for treating ras- oncogene-dependent tumors, such as cancers of the pancreas, colon, bladder, and thyroid.
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