rhodium(III)‐catalyzed regioselective distal C(sp2)‐H bond alkylation of quinoline N‐oxides using olefins as alkyl source and N‐oxide as the traceless directing group. The reaction exhibits broad substrate scope with excellent selectivity for C‐8 position and good yields of alkylated products. The usefulness of the developed catalytic protocol is established by synthesis of EP4 agonist. In mechanistic study, C‐8 olefinated
General and Practical Potassium Methoxide/Disilane-Mediated Dehalogenative Deuteration of (Hetero)Arylhalides
作者:Xin Wang、Ming-Hui Zhu、David P. Schuman、Dayou Zhong、Wen-Yan Wang、Lin-Yang Wu、Wei Liu、Brian M. Stoltz、Wen-Bo Liu
DOI:10.1021/jacs.8b07597
日期:2018.9.5
Herein we describe a general, mild and scalable method for deuterium incorporation by potassium methoxide/hexamethyldisilane-mediated dehalogenation of arylhalides. With CD3CN as a deuterium source, a wide array of heteroarenes prevalent in pharmaceuticals and bearing diverse functional groups are labeled with excellent deuterium incorporation (>60 examples). The ipso-selectivity of this method provides
在此,我们描述了一种通过甲醇钾/六甲基乙硅烷介导的芳基卤化物脱卤来掺入氘的通用、温和且可扩展的方法。以 CD3CN 作为氘源,广泛存在于药物中并具有不同官能团的杂芳烃被标记为具有优异的氘掺入(> 60 个例子)。这种方法的 ipso 选择性提供了对氘代吲哚和喹啉库的精确访问。我们方法的合成效用已通过将氘掺入复杂的天然和类药物化合物中得到证明。
The Diverse One-Pot Reactions of 2-Quinolylzincates: Homologation, Electrophilic Trapping, Hydroxylation, and Arylation Reactions
作者:Hye Jin Jeong、Suyeon Chae、Keunhong Jeong、Sung Keon Namgoong
DOI:10.1002/ejoc.201801192
日期:2018.12.6
The diverse C‐2 functionalizations of quinoline are successfully achieved via 2‐quinolylzincate intermediates by the four different types of title reactions.
通过2-喹啉基锌酸酯中间体通过四种不同类型的标题反应成功地实现了喹啉的各种C-2功能化。
Deuterodechlorination of Aryl/Heteroaryl Chlorides Catalyzed by a Palladium/Unsymmetrical NHC System
The catalytic deuterodechlorination of aryl/heteroaryl chlorides was developed with a palladium/unsymmetrical NHC system, and the precisely controlled introduction of deuterium into a variety of aryl/heteroaryl compounds was achieved with a high level of efficiency, selectivity, and deuteration degree. This method was also successfully applied to the transformation of bioactive agents even in a gram-scale
The nickel‐catalyzed deoxygenative deuteration of aryl/heteroaryl sulfamates has been developed, and the effective incorporation of deuterium into a variety of aromatic compounds was achieved with sufficient catalytic efficiency and high deuteration degree. This process tolerated reducible functional moieties and heterocyclic structures. Additionally, a double introduction of deuterium also successfully