摘要:
A process for the preparation of an optically active proline derivative of the formula ##STR1## in which R.sup.1 is alkyl, phenyl or benzyl, or an acid addition salt thereof, comprising reacting an S-proline ester of the formula ##STR2## in which R.sup.2 is alkyl with 1 to 4 carbon atoms, in a first stage with benzyl chloroformate of the formula ##STR3## in the presence of an acid-binding agent and in the presence of a diluent, thereby to produce an ester with the S-configuration on the asymmetrically substituted carbon atom, of the formula ##STR4## reacting such ester in a second stage with a Grignard compound of the formulaR.sup.1 --Mg Xin which X is chlorine, bromine or iodine, in the presence of a diluent, thereby to produce an S-proline derivative of the formula ##STR5## and reacting such S-proline derivative in a third stage with hydrogen in the presence of a catalyst, a diluent, and optionally an acid. The end product is new.
摘要:
A process for the preparation of the (-)-antipode of (E)-1-cyclohexyl-4,4-dimethyl-3-hydroxy-2-(1,2,4-triazol-1-yl)-pent-1-ene of the formula ##STR1## which comprises reacting the (E)-isomer of 1-cyclohexyl-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-pent-1-en-3-one of the formula ##STR2## with lithium aluminum hydride in the presence of an inert organic diluent and in the presence of a chiral aminoalcohol at a temperature between -70.degree. C. and +50.degree. C. The (-)-antipode is produced in high selectivity, using (-)-N-methyl-ephedrine.
摘要:
Novel halogenoalkyl-, alkenyl- and alkinyl-azoles of the formula ##STR1## in which X represents a nitrogen atom or a CH grouping,R represents optionally substituted tert.-alkyl or optionally substituted cycloalkyl, andA represents one of the groupings --C.tbd.C--, ##STR2## in which R.sup.1 represents halogen, alkoxy or trialkylsilyloxy,R.sup.2 represents hydrogen or halogen, andR.sup.3 represents halogen,and acid and metal salt addition products thereof synergize insecticides and herbicides which function by photosynthesis inhibition.
摘要:
The invention relates to hydroxyethylazolyl derivatives, defined herein by formula (I) and particularly to the use of said derivatives for the treatment of viral infections.