Catalytic Enantioselective Synthesis of Functionalized Tropanes Reveals Novel Inhibitors of Hedgehog Signaling
作者:Rishikesh Narayan、Jonathan O. Bauer、Carsten Strohmann、Andrey P. Antonchick、Herbert Waldmann
DOI:10.1002/anie.201307392
日期:2013.12.2
Dipolar cycloaddition: A highly efficient copper(I)‐catalyzed enantioselective [3+2] cycloaddition reaction of 1,3‐fused cyclic azomethine ylides and nitroalkenes has been developed. This method provides access to functionalized tropane scaffolds with several quaternary and tertiary stereocenters in a single step under mild reaction conditions.
Efficient synthesis of 3-substituted indoles through a domino gold(I) chloride catalyzed cycloisomerization/C3-functionalization of 2-(alkynyl)anilines
作者:C. Praveen、K. Karthikeyan、P.T. Perumal
DOI:10.1016/j.tet.2009.09.019
日期:2009.11
An efficient synthesis of 3-substituted indoles by a sequential approach involving gold(I) chloride catalyzed cycloisomerization/bis-addition and conjugate addition of 2-(alkynyl)anilines has been accomplished. A variety of 2-(alkynyl)anilines, aldehydes, isatins and nitroolefins undergo this overall process in good to excellent yields. This methodology represents an effective alternative to the classical
Dearomatization Reactions Using Phthaloyl Peroxide
作者:Anders M. Eliasen、Mitchell Christy、Karin R. Claussen、Ronald Besandre、Randal P. Thedford、Dionicio Siegel
DOI:10.1021/acs.orglett.5b02008
日期:2015.9.18
A new oxidative dearomatization reaction has been developed using phthaloylperoxide to chemoselectively install two oxygen–carbon bonds into aromatic precursors. The oxidation reaction proceeds only once; addition of superstoichiometric equivalents of phthaloylperoxide does not react further with the newly generated 1,3-cyclohexadiene. The reaction has been challenged by the addition of different
Synthesis of 3-arylindole derivatives from nitroalkane precursors
作者:Chia-Yu Huang、Chun-Wei Kuo、Ashok Konala、Tang-Hao Yang、Lyu Lin、Yu-Wen Chen、Veerababurao Kavala、Ching-Fa Yao
DOI:10.1039/c6ra21144e
日期:——
3-Arylindole derivatives were synthesized by Cu(I) catalysed intramolecular Ullmann coupling of 2-bromoarylaminoalkanes. 2-Bromoarylaminoalkanes were synthesized from 2-bromoarylnitroalkanes, which in turn prepared through AlCl3-mediated Friedel–Crafts alkylation of bromo-substituted β-nitrostyrenes and arenes.