A simple method has been developed for synthesis of γ-halo-enones. The approach employs a sequence involving initial indium-mediated allenylation reactions of phenacyl halides with propargyl bromide. This process is followed by acid-promoted rearrangement reactions of the formed homoallenic halohydrins. The new method can be incorporated into routes for the efficient synthesis of various five-membered
Facile Regiocontrolled Three-Step Synthesis of Poly-Substituted Furans, Pyrroles, and Thiophenes: Consecutive Michael Addition of Methyl Cyanoacetate to α,β-Enone, CuI-Mediated Aerobic Oxidation, and Acid-Catalyzed Paal-Knorr Synthesis
作者:Se-Hee Kim、Jin-Woo Lim、Cheol-Hee Lim、Jae-Nyoung Kim
DOI:10.5012/bkcs.2012.33.2.620
日期:2012.2.20
December 19, 2011An efficient synthesis of poly-substituted furans, pyrroles, and thiophenes was carried out in a regiocontrolledmanner via a three-step process; (i) conjugate addition of methyl cyanoacetate derivatives to α,β-enones, (ii)CuI-mediated aerobic oxidation, and (iii) Paal-Knorr type synthesis of five-membered heterocycles. Key Words : Furans, Pyrroles, Thiophenes, CuI, Paal-Knorr synthesisIntroductionRecently
E-mail: kimjn@chonnam.ac.kr 2011年12月6日接收,2011年12月19日接受 (i) 氰基乙酸甲酯衍生物与 α,β-烯酮的共轭加成,(ii) CuI 介导的有氧氧化,和 (iii) 五元杂环的 Paal-Knorr 型合成。关键词:呋喃,吡咯,噻吩,CuI,Paal-Knorr 合成介绍最近,我们报道了通过氰基乙酸甲酯与α,β-不饱和酮的共轭加成和随后的 CuI 介导的需氧氧化合成 2,5-二酮酯的有效方法。
TITANIUM (IV) COMPOUNDS AND METHODS OF FORMING HETEROCYCLIC COMPOUNDS USING SAME
申请人:REGENTS OF THE UNIVERSITY OF MINNESOTA
公开号:US20170158718A9
公开(公告)日:2017-06-08
The present disclosure provides Titanium (IV) compounds and methods of making heterocyclic compounds such as pyrroles using Titanium (IV) compounds. In certain embodiments, the Titanium (IV) compound is present in catalytic amounts.