The addition of metallo enolates to chiral 1-acylpyridinium salts. An asymmetric synthesis of (-)-sedamine
摘要:
Synthetically useful 2-(2-oxoalkyl)-2,3-dihydro-4-pyridones are prepared in high diastereomeric excess by addition of ketone metallo enolates to chiral 1-acyl-4-methoxypyridinium salts.