A Convenient Regioselective Synthesis of Mannich Bases
作者:C. Rochin、O. Babot、J. Dunogues、F. Duboudin
DOI:10.1055/s-1986-31742
日期:——
A new, convenient regioselective process for aminomethylation of ketones is reported, involving the in situ formation of silyl enol ethers and iminium salts.
A new, practical route to enoxysilanes is described from simple enolizable aldehydes or ketones, using the trimethylchlorosilane-sodium iodide—tertiary amine reagent in acetonitrile. From certain aldehydes, an onium intermediate has been isolated. A conformational study of this onium intermediate and a thermal unimolecular syn-elimination process may explain the stereoselectivity of the reaction. Such
A Practical Method for the Preparation of Trimethylsilyl Enol Ethers
作者:Ji-Mao Lin、Ben-Sheng Liu
DOI:10.1080/00397919708004194
日期:1997.3
Abstract In the mixed system of chlorotrimethylsilane/triethyl amine/N,N-dimethylformamide/potassium iodide/petroleum ether, aldehydes or ketones are silylated to silyl enolethers at room temperature. The N,N-dimethylformamide / potassium iodie layer can be used as circulating liquor for many times. The yields are high.