摘要:
A method is described for the production of sorbic anhydride, in which alkali metal or alkaline earth metal salts of sorbic acid are reacted with phosgene in an inert organic solvent. In addition, use thereof as a preservative in foods, in particular drinks, is described.
摘要:
A method is described for the production of sorbic anhydride, in which alkali metal or alkaline earth metal salts of sorbic acid are reacted with phosgene in an inert organic solvent. In addition, use thereof as a preservative in foods, in particular drinks, is described.
摘要:
What is described is a process for preparing compounds of the general formula (I) in which R1, R2 and R3 independently of one another represent hydrogen, an alkyl group or an aryl group, wherein compounds of the general formula (II) in which R1 and R2 have the meaning given for formula (I), are reacted with an alkylating agent of the general formula (III) R3X (III) in which X represents a halogen atom and R3 has the meaning given for formula (I), if appropriate in a solvent.
摘要:
The invention provides an improved method for the production of terminal group-capped polyethers using homogeneous catalysis in the presence of Brönstedt acids.
摘要:
What is described is a process for preparing compounds of the general formula (I) in which R1, R2 and R3 independently of one another represent hydrogen, an alkyl group or an aryl group, wherein compounds of the general formula (II) in which R1 and R2 have the meaning given for formula (I), are reacted with an alkylating agent of the general formula (III) R3X (III), in which X represents a halogen atom and R3 has the meaning given for formula (I), if appropriate in a solvent.
摘要:
The invention provides an improved method for the production of terminal group-capped polyethers using homogeneous catalysis in the presence of Brönstedt acids.