Monoester compound of 2,2-alkylidene bis(4,6-di-substituted phenol)

Claim 1

A compound of the formula, ##STR26## wherein R 1 and R 2 , which may be the same or different, each represents a C 1-4 alkyl group, a C 5-6 cycloalkyl group or a methyl-substituted C 5-6 cycloalkyl group; and one of R 3 and R 4 represents a hydrogen atom and the other represents a hydrogen atom or a C 1-10 alkyl group or both of them represent a methyl group; R 5 represents a C 4-9 alkyl group, a C 3-7 cycloalkyl group, a phenyl group, a C 1-4 alkyl-substituted phenyl group, a C 1-4 alkoxy-substituted phenyl group, a mono- or di-C 1-4 alkyl-substituted hydroxyphenyl group, a benzyl group or a pyridyl group.

Claim 30

A method of preparing a compound which comprises reacting a 2,2'-alkylidene bis(4,6-di-substituted phenol) of the formula (II), ##STR27## wherein R 1 and R 2 , which may be the same or different, each represents a C 1-4 alkyl group, a C 5-6 cycloalkyl group, or a methyl-substituted C 5-6 cycloalkyl group; and one of R 3 and R 4 represents a hydrogen atom and the other represents a hydrogen atom or a C 1-10 alkyl group or both of them represent a methyl group, with an esterifying agent selected from the group consisting of the compounds of the formulae (III) and (IV), R.sub.5 COCl (III) and (R.sub.5 CO).sub.2 O (IV) wherein R 5 represents a C 4-9 alkyl group, a C 3-7 cycloalkyl group, a phenol group, a C 1-4 alkyl-substituted phenyl group, a C 1-4 alkoxy-substituted phenyl group, a mono- or di-C 1-4 alkyl-substituted hydroxyphenyl group, a benzyl group or a pyridyl group, substantially at an equimolar amount in the presence of a reaction medium while maintaining the reaction temperature at from about 0° C. to about 30° C. until about 50% of the 2,2'-alkylidene bis(4,6-di-substituted phenol) is converted to the compound of the formula ##STR28## wherein R 1 and R 2 , which may be the same or different, each represents a C 1-4 alkyl group, a C 5-6 cycloalkyl group or a methyl-substituted C 5-6 cycloalkyl group; and one of R 3 and R 4 represents a hydrogen atom and the other represents a hydrogen atom or a C 1-10 alkyl group or both of them represent a methyl group; R 5 represents a C 4-9 alkyl group, a C 3-7 cycloalkyl group, a phenyl group, a C 1-4 alkyl-substituted phenyl group, a C 1-4 alkoxy-substituted phenyl group, a mono- or di-C 1-4 alkyl-substituted hydroxyphenyl group, a benzyl group or a pyridyl group and thereafter raising said reaction temperature to range from about 50° C. to about 100° C.

Claim 31

A method of preparing a compound which comprises reacting a 2,2'-alkylidene bis(4,6-di-substituted phenol) of the formula (II), ##STR27## wherein R 1 and R 2 , which may be the same or different, each represents a C 1-4 alkyl group, a C 5-6 cycloalkyl group, or a methyl-substituted C 5-6 cycloalkyl group; and one of R 3 and R 4 represents a hydrogen atom and the other represents a hydrogen atom or a C 1-10 alkyl group or both of them represent a methyl group, with an esterifying agent selected from the group consisting of the compounds of the formulae (III) and (IV), R.sub.5 COCl (III) and (R.sub.5 CO).sub.2 O (IV) wherein R 5 represents a C 4-9 alkyl group, a C 3-7 cycloalkyl group, a phenol group, a C 1-4 alkyl-substituted phenyl group, a C 1-4 alkoxy-substituted phenyl group, a mono- or di-C 1-4 alkyl-substituted hydroxyphenyl group, a benzyl group or a pyridyl group, substantially at an equimolar amount in the presence of a reaction medium while maintaining the reaction temperature at from about 0° C. to about 30° C. until about 50% of the 2,2'-alkylidene bis(4,6-di-substituted phenol) is converted to the compound of the formula ##STR28## wherein R 1 and R 2 , which may be the same or different, each represents a C 1-4 alkyl group, a C 5-6 cycloalkyl group or a methyl-substituted C 5-6 cycloalkyl group; and one of R 3 and R 4 represents a hydrogen atom and the other represents a hydrogen atom or a C 1-10 alkyl group or both of them represent a methyl group; R 5 represents a C 4-9 alkyl group, a C 3-7 cycloalkyl group, a phenyl group, a C 1-4 alkyl-substituted phenyl group, a C 1-4 alkoxy-substituted phenyl group, a mono- or di-C 1-4 alkyl-substituted hydroxyphenyl group, a benzyl group or a pyridyl group and thereafter raising said reaction temperature to range from about 50° C. to about 100° C.