摘要:
The present invention relates to a process for the preparation of &ggr;-lactams of the general formula I The invention relates also to novel advantageous intermediates of the general formulae V, IV and II and their salts and their use. The compounds of the general formula I are obtained by cyclising compounds of the general formula II which can be prepared from the intermediate compounds V.
摘要:
The present invention relates to a process for the preparation of &ggr;-lactams of the general formula I The invention relates also to novel advantageous intermediates of the general formulae V, IV and II and their salts and their use. The compounds of the general formula I are obtained by cyclising compounds of the general formula II which can be prepared from the intermediate compounds V.
摘要:
The invention concerns a method of producing oxazolidinones of formula (I), wherein R1-R5 have the meanings given in the description, by reacting cyclical anhydrides of formula (II) with carbonyl compounds of general formula (III) at temperatures between ambient temperature and approximately 150° C. The invention also concerns the production of the cyclical anhydrides of formula (II) by reacting N-protected aminodicarboxylic acids of formula (IV) with a dehydrating agent in situ. The invention further concerns the use of oxazolidinones of formula (I) for the &agr;-selective production of esters of formula (V) and amides of general formula (VII).
摘要:
The present invention is concerned with the formation of amide bonds. More specifically, the present invention, relates to processes for the manufacture of organogellant compounds (OG) as depicted below wherein L is selected from C2-C20 alkyl, C6-C20 aryl, C7-C20 alkylaryl, R1 are side chain substituents and one of X1, X2 is nitrogen and the other two are carbon. Processes of the present invention employ reaction mixtures with beneficial flow characteristics allowing sufficient agitation of all parts of these reaction mixtures and thus achieving adequate mixing of reaction partners and/or dissipation of heat. The beneficial flow characteristics are achieved by using suitable activation for coupling the terminal pyridine-carboxylic acid.
摘要:
The present invention is directed to a process for preparing β-amino-α-hydroxycarboxamides. The process works with epoxycarboxamides of the formula 2 which are reacted with ammonia or other amines.
摘要:
The present invention is aimed at a process for the preparation of compounds of the general formula (I). The objective process is in this case based on the Michael reaction of compounds of the general formula (III) with compounds of the general formula (IV), with subsequent hydrogenation and cyclization of the intermediates of the formula (II) obtained.
摘要:
The present invention is directed to a process for preparing β-amino-α-hydroxycarboxamides. The process works with epoxycarboxamides of the formula 2 which are reacted with ammonia or other amines.
摘要:
The present invention is aimed at a process for the preparation of compounds of the general formula (I). The objective process is in this case based on the Michael reaction of compounds of the general formula (III) with compounds of the general formula (IV), with subsequent hydrogenation and cyclization of the intermediates of the formula (II) obtained.
摘要:
The present invention is directed to a process for preparing β-amino-α-hydroxycarboxamides. The process works with epoxycarboxamides of the formula 2 which are reacted with ammonia or other amines.
摘要:
The present invention is directed towards compounds of the general formula (I) (I) are important intermediates for the preparation of pharmaceuticals. Further intermediates, process for the preparation of (I) and use thereof.