Stereoselective Synthesis of Tertiary Ethers through Geometric Control of Highly Substituted Oxocarbenium Ions
作者:Lei Liu、Paul E. Floreancig
DOI:10.1002/anie.201002281
日期:2010.8.9
Fully substituted, fully controlled! The geometries of 1,1‐disubstituted oxocarbeniumions and the conformations of oxocarbeniumions that contain a tertiary stereocenter can be predicted based on simple models. These models have been applied to highlystereoselective syntheses of tetrahydropyran derivatives that contain tertiaryethers (see scheme; RL, RS, and RN represent large, small, and nucleophilic
全面换人,全面控制!1,1-二取代的氧碳鎓离子的几何形状和包含叔立构中心的氧碳鎓离子的构象可以基于简单的模型来预测。这些模型已应用于含有叔醚的四氢吡喃衍生物的高度立体选择性合成(参见方案;R L、RS和 R N分别代表大基团、小基团和亲核基团)。
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone-Catalyzed Reactions Employing MnO<sub>2</sub> as a Stoichiometric Oxidant
作者:Lei Liu、Paul E. Floreancig
DOI:10.1021/ol102078v
日期:2010.10.15
Several oxidative reactions can be effected with MnO2 in the presence of substoichiometric quantities of DDQ. These transformations include oxidative cyclization, deprotection, and dehydrogenation reactions. The use of MnO2 as a terminal oxidant for DDQ-mediated reactions is attractive based on economical and environmental factors.
Kinetics‐Based Approach to Developing Electrocatalytic Variants of Slow Oxidations: Application to Hydride Abstraction‐Initiated Cyclization Reactions
作者:Jean‐Marc I. A. Lawrence、Paul E. Floreancig
DOI:10.1002/chem.202200335
日期:2022.4.19
through radical cation intermediates can be avoided by using constant potential conditions and current is maintained through the interplay between cation stability, oxidant strength, overpotential, and reaction concentration.