Metal-, Photocatalyst-, and Light-Free, Late-Stage C–H Alkylation of Heteroarenes and 1,4-Quinones Using Carboxylic Acids
作者:Daniel R. Sutherland、Marcos Veguillas、Conor L. Oates、Ai-Lan Lee
DOI:10.1021/acs.orglett.8b02988
日期:2018.11.2
Contrary to the accepted convention, this work shows that Minisci-type C–Halkylation does not require any metal, photocatalyst, light, or prefunctionalization of the readily available and inexpensive carboxylic acids to proceed well under mild conditions. These mild conditions can be utilized for late-stage alkylations of complex molecules, including pharmaceutical compounds and light-sensitive compounds
Iron-Catalyzed Radical Methylation of Activated Alkenes with tert-Butanol as the Methyl Source
作者:Zhengbao Xu、Rui Jia、Zhiwei Ma、Shouhao Cao、Liang Shen、Hongfang Ji
DOI:10.1055/s-0039-1690193
日期:2019.10
A free-radical-initiated methylation/addition/cyclization of N-arylacrylamides and a methylation/addition/elimination of quinines have been developed in which t-BuOH is used as a methylsource. These reactions provide effective and selective methods for the synthesis of various methylated oxindoles and quinones in moderate to good yields.
申请人:Industry Academic Cooperation Foundation of Yeungnam University 영남대학교 산학협력단(220040363026) BRN ▼515-82-06574
公开号:KR20180134632A
公开(公告)日:2018-12-19
본 발명은 나프토퀴논, 벤조퀴논 또는 안트라센디온 화합물과 다양한 사이클로알칸과의 구리-촉매 교차-탈수소화 커플링 반응을 이용한 퀴논 유도체 또는 안트라센디온 유도체의 신규한 제조방법, 이로 제조된 나프토퀴논 유도체, 벤조퀴논 유도체와 안트라센디온 유도체 및 이의 용도에 관한 것으로, 본 발명의 신규한 제조방법에 따르면, 한 단계로 나프토퀴논 유도체, 벤조퀴논 유도체 또는 안트라센디온 유도체를 제조할 수 있어 제조 효율을 향상시킬 수 있으며, 비용 및 시간을 절감할 수 있고, 본 발명에 따른 유도체들은 동물 의약품으로도 다양하게 활용될 수 있다.
Bismuth-catalyzed methylation and alkylation of quinone derivatives with tert-butyl peroxybenzoate as an oxidant
作者:Jian Yang、Yu Dong、Shuai He、Zhi-Chuan Shi、Yu Wang、Ji-Yu Wang
DOI:10.1016/j.tet.2019.130729
日期:2019.12
radical reaction mechanism. Particularly, TBPB was used not only as an efficient oxidant, but also as a green methyl source in such transformation. Moreover, this method could also be efficiently extended to the alkylation of quinones. This reaction tolerated a series of functional groups and prepared a series of derivatives of vitamin K3 and benzoquinone. Notably, antimalarial parvaquone was synthesized
Functionalization of saturated hydrocarbons in Gif-type systems using 2-methyl-1,4-naphthoquinone
作者:Derek H.R. Barton、Béatrice M. Chabot、Bin Hu
DOI:10.1016/0040-4039(96)00168-2
日期:1996.3
The reaction between cyclohexane and 2-methyl-1,4-naphthoquinone using hydrogen peroxide in the FeIIFeIV manifold gave the adduct in good yield. The same reaction was carried out with the FeIIIH2O2 system and gave also some 3-alkyl-2-methyl-1,4-naphthoquinone. The presence of FeII during the reaction showed that the FeIIFeIV manifold was again dominant.