Iron-Catalyzed Direct Alkenylation of 2-Substituted Azaarenes with <i>N</i>-Sulfonyl Aldimines via C–H Bond Activation
作者:Bo Qian、Pan Xie、Yinjun Xie、Hanmin Huang
DOI:10.1021/ol200684b
日期:2011.5.20
A novel iron-catalyzed alkenylation of 2-substituted azaarenes through sp3 C–Hbondactivation has been developed. A favorable E2-elimination is proposed as a key step to cleavage of C–H and C–N bonds for the construction of a C═C bond in high stereoselectivity. This transformation represents an efficient way to synthesize 2-alkenylated azaarenes from simple starting materials.
Direct alkenylation of alkylazaarenes with aldehydes through C(sp3)–H functionalization under catalytic InCl3 activation
作者:Zaini Jamal、Yong-Chua Teo、Gina Shiyun Lim
DOI:10.1016/j.tet.2016.03.004
日期:2016.4
Under the influence of InCl3 as a Lewis acid catalyst, a methodology on the C(sp3)–H functionalization of alkylazaarenes has been demonstrated through the activation of benzylic C–H bonds towards their addition reaction with the appropriate electrophiles. This methodology was chiefly applied in the direct alkenylation of primary and secondarybenzylic C–H bonds of alkylazaarenes with aldehydes. A variety
azaheterocycle N-oxides with alkenes catalyzed by iodine under metal- and external oxidant-free reaction conditions has been developed. A variety of (E)-2-styrylazaheterocycles have been produced in moderate to excellent yields. The mechanistic exploration indicated that the N-oxide group played dual roles as both the directing group and an internal oxidant in this catalytic cycle.
Iron-catalyzed C(sp<sup>3</sup>)–H functionalization of methyl azaarenes: a green approach to azaarene-substituted α- or β-hydroxy carboxylic derivatives and 2-alkenylazaarenes
作者:Danwei Pi、Kun Jiang、Haifeng Zhou、Yuebo Sui、Yasuhiro Uozumi、Kun Zou
DOI:10.1039/c4ra10939b
日期:——
An iron-catalyzed C(sp3)–H functionalization of methyl azaarenes with carbonyls to access the title compounds have been described.
Deaminative Olefination of Methyl <i>N</i>-Heteroarenes by an Amine Oxidase Inspired Catalyst
作者:Pradip Ramdas Thorve、Biplab Maji
DOI:10.1021/acs.orglett.0c04060
日期:2021.1.15
We explored the bioinspired o-quinone cofactor catalyzed aerobic primary amine dehydrogenation for a cascade olefination reaction with nine different methyl N-heteroarenes, including pyrimidines, pyrazines, pyridines, quinolines, quinoxolines, benzimidazoles, benzoxazoles, benzthiazoles, and triazines. An o-quinone catalyst phd (1,10-phenanthroline-5,6-dione) combined with a Brønsted acid catalyzed
我们探索了仿生邻醌辅因子催化的有氧伯胺脱氢与九种不同的甲基N-杂芳烃的级联烯化反应,包括嘧啶、吡嗪、吡啶、喹啉、喹啉、苯并咪唑、苯并恶唑、苯并噻唑。一个ø与布朗斯台德酸组合的-quinone催化剂博士(1,10-菲咯啉-5,6-二酮)催化的反应。N-杂芳基芪类化合物在温和条件下以高产率和 ( E )-选择性合成,使用氧气 (1 atm) 作为唯一氧化剂,无需过渡金属盐、配体、化学计量碱或氧化剂。