Nickel-Catalyzed C(sp<sup>3</sup>)–H Functionalization of Benzyl Nitriles: Direct Michael Addition to Terminal Vinyl Ketones
作者:Ninghui Zhang、Chunli Zhang、Xiaoping Hu、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.1c02074
日期:2021.8.6
An efficient nickel(0)-catalyzed addition of benzyl nitriles to terminal vinyl ketones via C(sp3)–H functionalization has been developed. The reaction provides a novel and efficient protocol for the synthesis of α-functionalized benzyl nitriles with a wide range of structural diversity under mild reaction conditions while obviating the use of a strong base. The work might be potentially useful toward
Synthesis of 1-Cyano-3-acylnaphthalenes via Formal [4+2] Benzannulation of 2-(2-Alkynylphenyl)acetonitriles and Alkynones
作者:Lu-Lu Chen、Jing-Wen Zhang、Wan-Wan Yang、Ji-Ya Fu、Jun-Yan Zhu、Yan-Bo Wang
DOI:10.1021/acs.joc.9b00948
日期:2019.6.21
of 1-cyano-3-acylnaphthalenes from 2-(2-alkynylphenyl)acetonitriles and alkynones throughsequential C–C bond coupling has been developed. This protocol is characterized by mild conditions, excellent functional group tolerance, complete regioselectivity, and atom economy. The plausible mechanism, gram-scale synthesis, and further transformations of the product were studied.
Palladium‐Catalyzed Tandem Cyclization of 2‐(2 Ethynylphenyl)acetonitriles and Isocyanides: Access to Indeno[2,1‐
<i>b</i>
]pyrroles
作者:Hui‐Shu Lin、Yong‐Zhou Pan、Yu‐Hong Tian、Ying‐Ming Pan、Xu Wang
DOI:10.1002/adsc.202101311
日期:2022.3.15
A palladium-catalyzed tandem cyclization of 2-(2-ethynylphenyl)acetonitriles with isocyanides has been developed. Various indeno[2,1-b]pyrroles were prepared in 55%–82% yields under air atmosphere at 100 °C. The key to the success of this protocol is construction of new C−C and C−N bonds via the orderly insertion of isocyanides.
已开发出钯催化的 2-(2-乙炔基苯基) 乙腈与异氰化物的串联环化反应。各种茚并[2,1- b ]吡咯在 100 °C 空气气氛下以 55%–82% 的产率制备。该协议成功的关键是通过有序插入异氰化物来构建新的 C-C 和 C-N 键。
Ligand-controlled regiodivergent Ni-catalyzed <i>trans</i>-hydroboration/carboboration of internal alkynes with B<sub>2</sub>pin<sub>2</sub>
Unprecedented regioselective trans-hydroboration and carboboration of unbiased electronically internal alkynes were realized via a nickel catalysis system with the aid of the directing group strategy. Furthermore, the excellent α- and β-regioselectivity could be accurately switched by the nitrogen ligand (terpy) and phosphine ligand (Xantphos). Mechanistic studies provided an insight into the rational
Herein, we describe a novel approach to the synthesis of benzocycloheptene derivatives via base-promoted (5 + 2) annulation between 2-(alkynylaryl)acetonitriles and arylalkynes. In this chemistry, 2-(alkynylaryl)acetonitriles are employed as a new C5 synthon to construct various benzocycloheptene(s) derivatives by building two C–C bonds in one single step. This method features excellent regioselectivity