Cleavage of esters under nearly neutral conditions at high pressure. Chemo- and regioselective hydrolysis in organic solvents
摘要:
Hydrolysis of esters proceeded at room temperature under high pressures in the presence of iPr2NEt or N-methylmorpholine using CH3CN-H2O (60:1) as the solvent. This very mild procedure enables the smooth hydrolysis of biologically important compounds such as amino esters, aliphatic unsaturated fatty esters, and beta-hydroxy esters; no racemization, no isomerization, and no side reactions take place.
Although the reaction of dienolate (1) with aldehydes is frequently lacking in regio- and diastereo-selectivity, the γ-tin substituted derivatives (5), easily obtainable from (1), give (3) and (4) diastereoselectively by controlling the reaction conditions.
Stabilization and activation of dienolates with germanium and tin. Stereo- and regioselective aldol reactions, regioselective coupling reactions, and regioselective synthesis of amino acid derivatives
Hydrolysis of esters proceeded at room temperature under high pressures in the presence of iPr2NEt or N-methylmorpholine using CH3CN-H2O (60:1) as the solvent. This very mild procedure enables the smooth hydrolysis of biologically important compounds such as amino esters, aliphatic unsaturated fatty esters, and beta-hydroxy esters; no racemization, no isomerization, and no side reactions take place.