Iron-catalyzed regioselective alkylation of 1,4-quinones and coumarins with functionalized alkyl bromides
作者:Dengke Li、Xianfu Shen
DOI:10.1039/c9ob02289a
日期:——
A simple and efficient Fe-catalyzed regioselectivealkylation of 1,4-quinones and coumarins, using functionalized alkyl bromides as alkylating reagents, has been developed. The reaction proceeds under mild conditions with the addition of alkyl bromides to a wide range of 1,4-quinone and coumarin derivatives with a broad substrate scope and wide functional group tolerance to provide the products in
Metal-free oxidative cross-dehydrogenative coupling of quinones with benzylic C(sp<sup>3</sup>)–H bonds
作者:Yu Dong、Jian Yang、Shuai He、Zhi-Chuan Shi、Yu Wang、Xiao-Mei Zhang、Ji-Yu Wang
DOI:10.1039/c9ra05678e
日期:——
A metal-free cross-dehydrogenative coupling of quinones with toluene derivatives has been established. A series of quinones were subjected to reaction with toluene derivatives in the presence of di-tertbutyl peroxide (DTBP) for direct synthesis of benzylquinones. The method exhibits good functional group tolerance, and desired products were obtained in moderate to good yields. Meanwhile, a radical
methodology is compatible with a wide variety of diversely substituted 1,4-naphthoquinones as well as various cheap, readily available benzyl bromides with excellent functional group tolerance. The benzylation mechanism was investigated and supports a three-step radical cascade with the key involvement of the photogenerated superoxide anion radical.
1,4-NAPHTHOQUINONES DERIVATIVES AND THERAPEUTIC USE THEREOF
申请人:Davioud-Charvet Elisabeth
公开号:US20110059972A1
公开(公告)日:2011-03-10
1,4 naphthoquinones derivatives, of formula (I)
wherein A is selected from the following rings:
their preparation and their application as antimalarial agents