Enantioselective Formal C(sp<sup>3</sup>
)−H Bond Activation in the Synthesis of Bioactive Spiropyrazolone Derivatives
作者:Houhua Li、Rajesh Gontla、Jana Flegel、Christian Merten、Slava Ziegler、Andrey P. Antonchick、Herbert Waldmann
DOI:10.1002/anie.201811041
日期:2019.1.2
Herein, we report the first enantioselective annulation of α‐arylidene pyrazolones through a formalC(sp3)−Hactivation under mild conditions enabled by highly variable RhIII‐Cpx catalysts. The method has a wide substrate scope and proceeds with good to excellent yields and enantioselectivities. Its synthetic utility was demonstrated by the late‐stage functionalization of drugs and natural products
Enantioselective α-Arylation of Aldehydes via Organo-SOMO Catalysis. An Ortho-Selective Arylation Reaction Based on an Open-Shell Pathway
作者:Jay C. Conrad、Jongrock Kong、Brian N. Laforteza、David W. C. MacMillan
DOI:10.1021/ja9026902
日期:2009.8.26
The intramolecular alpha-arylation of aldehydes has been accomplished using singly occupied molecular orbital (SOMO) catalysis. Selective oxidation of chiral enamines (formed by the condensation of an aldehyde and a secondary amine catalyst) leads to the formation of a 3pi-electron radical species. These chiral SOMO-activated radical cations undergo enantioselective reaction with an array of pendent
Palladium-Catalyzed Synthesis of Tricyclic Indoles via a N–S Bond Cleavage Strategy
作者:Bo-Sheng Zhang、Fan Wang、Xue-Ya Gou、Ying-Hui Yang、Wan-Yuan Jia、Yong-Min Liang、Xi-Cun Wang、Yuke Li、Zheng-Jun Quan
DOI:10.1021/acs.orglett.1c02715
日期:2021.10.1
bond cleavage with vinyl palladium, thus achieving a highly selective C–N coupling reaction in the Catallani–Lautens reaction system. On the basis of this discovery, a one-step synthesis of highly functionalized tricyclic indole derivatives was realized.