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.
报道了一种新的、便捷的酮类化合物氨甲基化区域选择性过程,该过程涉及硅烷基烯醇醚和亚胺盐的现场生成。
Carbon-Carbon Bond Formation by the Use of Chloroiodomethane as a C<sub>1</sub>Unit. III. A Convenient Synthesis of the Mannich Base from Enol Silyl Ether by a Combination of Chloroiodomethane and<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetramethylmethanediamine
a combination of chloroiodomethane (CH2ClI) and N,N,N′,N′-tetramethylmethanediamine (TMMD) in DMSO as the solvent at ambient temperature. The mechanism of the transformation is discussed on the basis of product analysis and 1H NMR spectral studies. The reagent system CH2ClI/TMMD also provides a convenient route to the Eschenmoser’s salt (Me2\overset+N=CH2,\overset−I).
Abstract γ-Methylene derivatives of α,β-unsaturatedketones are obtained readily by a one-pot procedure exploiting the reaction of O-silylated dienolates with commercially available formaldehyde N, N-dimethyliminium chloride in anhydrous N, N-dimethylformamide, in situ oxidation of the Mannich reaction product with hydrogenperoxide, and elimination of N,N-dimethylhydroxylamine from the resultant N-oxide
Regioselective mannich reactions via trimethylsilyl enol ethers
作者:S. Danishefsky、M. Prisbylla、B. Lipisko
DOI:10.1016/s0040-4039(00)71510-3
日期:1980.1
Site-specific reactions of trimethylsilyl enolates and trimethylsilyldienolates are described.
描述了三甲基甲硅烷基烯醇酸酯和三甲基甲硅烷基二烯酸酯的位点特异性反应。
O-substituted 6-methyltramadol derivatives
申请人:GRUENENTHAL GMBH
公开号:US20030220389A1
公开(公告)日:2003-11-27
The invention relates to O-substituted 6-methyl-tramadol derivatives, to methods for producing them, to medicaments containing these compounds, to the use of O-substituted 6-methyl-tramadol derivatives for producing medicaments for treating pain and other symptoms or diseases, and to methods of treatment using the medicaments.