Patent classifications
C07C69/07
Preparation of homoallylic compounds by reaction of cyclopropylvinyl precursors with bronstedt acids
A method of forming homoallylic compounds 2 from cyclopropylvinyl precursors 1 in the presence of a Bronsted acid HQ ##STR00001##
Preparation of homoallylic compounds by reaction of cyclopropylvinyl precursors with bronstedt acids
A method of forming homoallylic compounds 2 from cyclopropylvinyl precursors 1 in the presence of a Bronsted acid HQ ##STR00001##
PRO-FRAGRANCE COMPOUNDS
A compound is provided of Formula (I)
##STR00001##
wherein R.sup.1 represents a C.sub.3 to C.sub.20 hydrocarbon group derived from an alcohol of formula R.sup.1OH, from a formate of formula R.sup.1OCHO, or a cinnamyl aldehyde of Formula (II)
##STR00002##
wherein a compound of Formula I is capable of releasing a compound, when oxidized, selected from the group consisting of a fragrant alcohol of formula R.sup.1OH, a fragrant formate ester of formula R.sup.1OCHO and aryl aldehyde of Formula (III)
##STR00003##
wherein R.sup.2 is, independently, hydrogen atom, hydroxyl group, optionally substituted C.sub.1-C.sub.6 alkyl group, C.sub.1-C.sub.6 alkoxy group, or O(CO)CH(CH3).sub.2 wherein any two of R.sup.2 may form an optionally substituted 5 or 6 membered ring. The compounds are useful for example as a precursor for the prolonged delivery or release of fragrant compounds such as fragrant alcohols, fragrant aldehydes or fragrant formates.
PRO-FRAGRANCE COMPOUNDS
A compound is provided of Formula (I)
##STR00001##
wherein R.sup.1 represents a C.sub.3 to C.sub.20 hydrocarbon group derived from an alcohol of formula R.sup.1OH, from a formate of formula R.sup.1OCHO, or a cinnamyl aldehyde of Formula (II)
##STR00002##
wherein a compound of Formula I is capable of releasing a compound, when oxidized, selected from the group consisting of a fragrant alcohol of formula R.sup.1OH, a fragrant formate ester of formula R.sup.1OCHO and aryl aldehyde of Formula (III)
##STR00003##
wherein R.sup.2 is, independently, hydrogen atom, hydroxyl group, optionally substituted C.sub.1-C.sub.6 alkyl group, C.sub.1-C.sub.6 alkoxy group, or O(CO)CH(CH3).sub.2 wherein any two of R.sup.2 may form an optionally substituted 5 or 6 membered ring. The compounds are useful for example as a precursor for the prolonged delivery or release of fragrant compounds such as fragrant alcohols, fragrant aldehydes or fragrant formates.
Compound with a woody odour
The present invention concerns 2-methyl-5-[2-methyl-3-methylene-bicyclo[2.2.1]hept-5-en-2-yl)]-2-penten-1-ol in any of its stereometric forms or a lower ester thereof and their use as perfuming ingredient, in particular to impart sandalwood and cedar wood notes.
Compound with a woody odour
The present invention concerns 2-methyl-5-[2-methyl-3-methylene-bicyclo[2.2.1]hept-5-en-2-yl)]-2-penten-1-ol in any of its stereometric forms or a lower ester thereof and their use as perfuming ingredient, in particular to impart sandalwood and cedar wood notes.