highly efficient and practical synergisticallymetal/proton‐catalyzed Conia–ene reaction for the synthesis of bicyclo[3.n.1]alkanones has been developed. This synergisticcatalysis was successfully utilized in modifying natural compounds such as methyl dihydrojasmonate, α,β‐thujone, and 5α‐cholestan‐3‐one. Furthermore, the bridged carbonyl group of bicyclo[3.2.1]alkanones could be easily attacked by nucleophiles
Synthesis of Spirodiones and Their Structure Determination by X-Ray Crystallography
作者:S. Janardhanam、A. Balakumar、K. Rajagopalan、L. Suganthi Bai、K. Ravikumar、S. S. Rajan
DOI:10.1080/00397919308009782
日期:1993.2
Abstract A rational synthesis of Spiro bicyclo (5,4) dec-2-ene-3-methyl-1,6-dione (1) and Spiro bicyclo (5,5) undec-2-ene-3-methyl-1,7-dione (2) from 2-acetyl cycloalkanone is described. Compounds (1) and (2) have very high potentials as important precursors to many naturally occurring bridged tricyclic compounds. A single crystal X-ray crystallographic study of compound (2) was carried out to establish
The ruthenium(II)-catalyzed hydration of terminalalkynes in PEG-400 to yield methyl ketones through Markovnikov addition of water across alkyne is reported.
报道了在 PEG-400 中钌 (II) 催化的末端炔烃的水合作用,通过在炔烃上加入马尔可夫尼科夫水生成甲基酮。