3-methyl-5-(4-methylphenyl)isoxazole 在
二氧化铂氢气 作用下,
以
乙醇 为溶剂,
反应 12.0h,
以1.02 g (100% of theory) of the title compound are obtained as a white solid的产率得到3-氨基-1-(4-甲基苯基)丁-2-烯-1-酮
Synthesis of Polysubstituted Trifluoromethylpyridines from Trifluoromethyl-α,β<i>-</i>ynones
作者:Tianyu Yang、Zhoubin Deng、Ke-Hu Wang、Pengfei Li、Danfeng Huang、Yingpeng Su、Yulai Hu
DOI:10.1021/acs.joc.9b02873
日期:2020.1.17
trifluoromethylpyridine derivatives by the Bohlmann-Rahtz heteroannulation reaction is described, which use trifluoromethyl-α,β-ynones as trifluoromethyl building blocks to react with β-enamino esters or β-enamino ketones in the presence of ZnBr2 to form the trifluoromethylpyridine derivatives in good yields. The protocol has the advantages of readily available starting materials, mild reaction conditions, and
Pd-Catalyzed Triple-Fold C(sp<sup>2</sup>)–H Activation with Enaminones and Alkenes for Pyrrole Synthesis via Hydrogen Evolution
作者:Leiqing Fu、Yunyun Liu、Jie-Ping Wan
DOI:10.1021/acs.orglett.1c01301
日期:2021.6.4
The synthesis of NH-free pyrroles via Pd-catalyzed annulation of enaminones and alkenes is reported. With the catalysis of Pd(II), the activation of triple C(sp2)–H bonds, including one internal C(sp2)–H bond in enaminone, has been activated to provide various pyrroles. The interesting evolution of hydrogen gas from the reactions has been observed by a hydrogen detector.
A concise and efficient method for the synthesis of alkynyl/benzoyl-functionalized quinolines through TfOH-promoted cascade 1,4-conjugate addition/intramolecular annulation/aromatization process is established.
Copper-catalyzed C–H/N–H annulation of enaminones and alkynyl esters for densely substituted pyrrole synthesis
作者:Leiqing Fu、Jie-Ping Wan、Liyun Zhou、Yunyun Liu
DOI:10.1039/d1cc06768k
日期:——
copper-catalyzed annulation of enaminones with alkynyl esters for the facilesynthesis of different pyrroles with a 2,3,4,5-tetrasubstituted structure has been developed. With Cu(OAc)2 as the only catalyst, the tunable synthesis of 2-vinyl and 2,3-dicarboxyl-functionalized pyrroles has been achieved by using terminal and internal alkynyl esters, respectively. The synthesis of 2-vinyl pyrroles represents the first