The present invention is concerned with novel compounds of formula (I) having 5HT
4
-antagonistic properties. The invention further relates to methods for preparing such novel compounds, pharmaceutical compositions comprising said novel compounds as well as the use as a medicine of said compounds.
Efficient and Scalable Method for the Selective Alkylation and Acylation of Secondary Amines in the Presence of Primary Amines
作者:Frédéric Laduron、Vanessa Tamborowski、Luc Moens、András Horváth、Dirk De Smaele、Stef Leurs
DOI:10.1021/op049812w
日期:2005.1.1
Selective substitution of secondary amines in the presence of primary amines is performed by using the reaction solvent, methyl isobutylketone (MIBK), as a temporary protecting group for the primary amine. After acylation or alkylation of the secondary amine, the resulting imine intermediate is smoothly hydrolysed, leading to the free primary amine in high yield and purity. This procedure represents