Axially Chiral C2-Symmetric N-Heterocyclic Carbene (NHC) Palladium Complex-Catalyzed Asymmetric Fluorination and Amination of Oxindoles
作者:Rui Zhang、De Wang、Qin Xu、Jiajun Jiang、Min Shi
DOI:10.1002/cjoc.201200289
日期:2012.6
Chiral C2‐symmetric N‐heterocyclic carbene (NHC) palladium diaquo complex 5b prepared from (S)‐BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to give the corresponding products in moderate enantioselectivities along with good to excellent yields.
The Synthesis of a New Class of Chiral Pincer Ligands and Their Applications in Enantioselective Catalytic Fluorinations and the Nozaki-Hiyama-Kishi Reaction
作者:Qing-Hai Deng、Hubert Wadepohl、Lutz H. Gade
DOI:10.1002/chem.201102375
日期:2011.12.23
ligands. These ligands were subsequently applied in the nickel(II)‐catalyzed enantioselective fluorination of oxindoles and β‐ketoesters to obtain the corresponding products with enantioselectivities of up to >99 % ee and high yields. Application of the chiral pincer ligands in the chromium‐catalyzed enantioselective Nozaki–Hiyama–Kishireaction of aldehydes gave the corresponding alcohols with an optimal
Iron(iii)–salan complexes catalysed highly enantioselective fluorination and hydroxylation of β-keto esters and N-Boc oxindoles
作者:Xin Gu、Yan Zhang、Zhen-Jiang Xu、Chi-Ming Che
DOI:10.1039/c4cc01631a
日期:——
Chiral iron(III)âsalan complexes catalysed highly enantioselective α-fluorination and α-hydroxylation of β-keto esters and N-Boc oxindoles to give the corresponding products in high yields and good-to-excellent ee values under mild reaction conditions.