Activation Relay on Rhodium-Catalyzed C–H Aminomethylation in Cooperation with Photoredox Catalysis
作者:Ruixing Liu、Jiaxin Liu、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.9b01261
日期:2019.6.7
A site selective C–H aminomethylation at indole’s C3 position has been achieved by merging rhodium(III)-catalyzed C–H activation and photoredox catalysis in a one-pot manner. An investigation of the mechanistic insights rationalized the essence of the activation relay and the combination mode.
highly selective C-2 difluoromethylation of indole derivatives was developed by using sodium difluoromethylsulfinate (HCF2SO2Na) as the source of difluoromethyl groups and a Cu(II) complex as the catalyst. Various substrates were well tolerated in this transformation and the desired products were obtained in moderate to good yields. Moreover, the late-stage C-2 difluoromethylation of bioactive molecules
通过使用二氟甲基亚磺酸钠(HCF 2 SO 2 Na)作为二氟甲基的来源和Cu(II)络合物作为催化剂,开发了一种新颖且高效的吲哚衍生物高选择性C-2二氟甲基化方法。在这种转化中,各种底物都具有良好的耐受性,并且以中等至良好的产率获得了所需的产物。此外,以高收率实现了含有吲哚环的生物活性分子的后期C-2二氟甲基化。通常,该反应具有出色的官能团相容性,广泛的底物范围和出色的C-2选择性。
Rhodium‐Catalyzed Additive‐Free C−H Ethoxycarbonylation of (Hetero)Arenes with Diethyl Dicarbonate as a CO Surrogate
as a CO-free and operationally simple protocol. In this reaction, stable and commercially available diethyl dicarbonate serves as a practical alkoxycarbonyl source, and only ethanol and CO2 were produced as byproducts. The utility of this protocol was demonstrated by a gram-scale reaction and the transformation of the ethyl ester moiety.
吲哚和芳基吡啶与二碳酸二乙酯的无添加剂乙氧基羰基化已被开发为无 CO 且操作简单的协议。在该反应中,稳定且可商购的二碳酸二乙酯作为实用的烷氧基羰基来源,并且仅产生乙醇和CO 2作为副产物。该协议的效用通过克级反应和乙酯部分的转化得到了证明。
Palladium-Assisted Regioselective C–H Cyanation of Heteroarenes Using Isonitrile as Cyanide Source
作者:Shuguang Xu、Xiaomei Huang、Xiaohu Hong、Bin Xu
DOI:10.1021/ol302070t
日期:2012.9.7
A palladium-catalyzedregioselectiveC–Hcyanation of heteroarenes was achieved using tert-butyl isocyanide as “CN” source, which provides a new and unique strategy for the preparation of (hetero)aryl nitriles. Indoles, pyrroles, and aromatic rings could be efficiently cyanated through C–Hbondactivation with high regioselectivity.
simple selenation with limited atom economy and complicated reaction system. In this work, we designed benzoselenazolone as a novel bifunctional selenide reagent for both off‐ and on‐DNA C−H selenylation under rhodium(III) catalysis. We show that using benzoselenazolone allowed production of a series of selenylation products containing an adjacent aminoacyl group in a fast and efficient way, with high