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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(16):4611-4615
Rhodium‐catalyzed C(sp2)−H functionalization reactions of 4‐aryl‐5‐pyrazolones followed by [3+2] annulation reactions with alkynes provide rapid access to highly enantioenriched five‐membered‐ring 4‐spiro‐5‐pyrazolones. The use of a chiral SCpRh catalyst enabled the synthesis of a large range of spiropyrazolones with all‐carbon quaternary stereogenic centers in up to 99 % yield and 98 % ee from readily available substrates. 相似文献
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Hua Chen Yi Chen Xiaoxiao Tang Shunfa Liu Runping Wang Tianbao Hu Lu Gao Zhenlei Song 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(14):4743-4747
A Rh‐catalyzed reaction of silacyclobutanes (SCBs) with unactivated alkynes has been developed to form silacyclohexenes with high chemoselectivity. Good enantioselectivity at the stereogenic silicon center was achieved using a chiral phosphoramidite ligand. The resulting silacyclohexenes are useful scaffolds for synthesizing structurally attractive silacyclic compounds. 相似文献
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