Synthetic Applications in Radical/Radical Cationic Cascade Reactions
作者:Heiko Rinderhagen、Jochen Mattay
DOI:10.1002/chem.200304827
日期:2004.2.20
acetylenic side chain. The reactions result in bi- to tetracyclic ring systems via a fragmentation-radical/radical cationic addition reaction pathway with well defined ring juncture. The mode of cyclisation (endo/exo) can be partially controlled by addition of nucleophiles due to the suppression of radical cationic reaction pathways. Quantum chemical calculation of the cyclisation transition states underline
Site-selective ring opening of bicyclo[n.1.0]alkanols: an Fe(<scp>ii</scp>)-catalyzed 1,6-conjugate addition to <i>p</i>-quinone methides
作者:Neha Jha、Subhadip Mondal、Manmohan Kapur
DOI:10.1039/d3cc04135b
日期:——
Herein, we report an efficient synthetic strategy for an Fe(ii)-catalyzed site-selective ring opening of bicyclo[n.1.0]alkanols and their concomitant 1,6-conjugate addition to p-quinone methides. Access to tertiary carbon centers with appendaged carbocycles of distinct sizes and functional groups are achieved, under a substrate-controlled bond scission of the fused cyclopropanols. Synthetic derivatizations
noncyclic hypervalent iodine nitrooxylating reagent is prepared from aryliodine diacetate and HNO3. This reagent facilitates the zinc-catalyzed regioselective nitrooxylation of cyclopropylsilylethers with broad scope, and also can be used in the nitrooxylation of various enolizable C−H bonds.