Patent ID: 6166225
Filing Date: 2000-12-26
Classification: C07D

Abstract:
A method of producing a dialdehyde monoacetal (III) from a dialdehyde (I) and a diol (II) characterised in that it comprises:a first step where said dialdehyde (I) and said diol(II) are reacted to obtain a dialdehyde bisacetal (IV), the mole amount of said diol(s) (II) being at least twice amount of said dialdehyde (I); anda second step where said dialdehyde bisacetal (IV) is reacted with said dialdehyde (I); said dialdehyde (I), diol (II), dialdehyde monoacetal (III) and dialdehyde bisacetal (IV) being shown in the following Formulae (I) to (III) ##STR10## wherein R.sup.1 is a hydrocarbon groupHO--R.sup.2 --OH (II)wherein R.sup.2 is a hydrocarbon group ##STR11## (wherein R.sup.1 and R.sup.2 are the same as in Formulae (I) and (II) respectively ##STR12## wherein R.sup.1 and R.sup.2 are the same as in Formulae (I) and (II) respectively.