摘要:
Tetrahydropyridazinones of the formula I ##STR1## wherein R denotes an optionally substituted carbocyclic or heterocyclic radical, R.sup.1 denotes hydrogen; alkyl; aralkyl, which is optionally substituted in the aryl part; or acyl, and R.sup.2 denotes hydrogen; alkyl, which can optionally be substituted; or optionally substituted phenyl; and their acid addition compounds, if these can be prepared.The tetrahydropyridazinone derivatives of the formula I according to the invention and their physiologically acceptable salts exhibit useful pharmacological actions.
摘要:
The subject matter of the invention is the new 2-azido-3-benzyloxy-propionic acid benzyl ester which is a valuable intermediate product for the production of D,L-serine or derivatives of D,L-serine. The new compound is produced by reacting 2-chloroacrylonitrile with twice the molar amount of benzyl alcohol to form 3-benzyloxy-2-chloropropionic acid imino benzyl ester, saponifying this with acid to form 3-benzyloxy-2-chloropropionic acid benzyl ester, and finally exchanging the chlorine atom by means of an alkali metal azide in the presence of a phase transfer catalyst for an azido group.