![[3 + 2] Cycloaddition of N-Amino(iso)quinolinium Salts with Vinylsulfonium Salt: Synthesis of Pyrazolo[1,5-a]quinoline and Pyrazolo[5,1-a]isoquinoline Derivatives](/cms/10.1021/acs.joc.5c00377/asset/images/medium/jo5c00377_0010.gif)
![A One-Pot Synthesis of Substituted Pyrrolo[2,1-a]isoquinolines via an Oxidation/Annulation Sequence of 2-(3,4-Dihydroisoquinolin-2(1H)-yl)malononitriles](/cms/10.1021/acs.joc.5c00639/asset/images/medium/jo5c00639_0007.gif)
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Exceptions, Paradoxes, and Their Resolutions in Chemical Reactivity
![Synthesis of Sulfonylthiophenes through [3+2] Cycloaddition of Pyridinium 1,4-Zwitterionic Thiolates with (E)-β-Iodovinyl Sulfones or Bromoallylsulfones](/cms/10.1021/acs.joc.5c00188/asset/images/medium/jo5c00188_0012.gif)
![Defluorinative Approach for the Synthesis of Chromones via [4 + 2] Annulation of Difluoro Quinone Methide](/cms/10.1021/acs.joc.5c00206/asset/images/medium/jo5c00206_0009.gif)
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![Iridium-Catalyzed Asymmetric Hydrogenation of Heteroaromatics with Multiple N Atoms via Substrate Activation: An Entry to 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrimidine-3-carbonitrile Core of a Potent BTK Inhibitor](/cms/10.1021/acs.joc.3c02396/asset/images/medium/jo3c02396_0011.gif)
