possessing two single or two double bonds in the positions indicated by the dotted lines (n = 1 or 2) are prepared by reacting, in the presence of a basic reagent, a dialdehyde of formula
wherein the index n and the dotted lines have the above meaning with a diphosphonate of formula
wherein R represents an alkyl radical. Compounds of formula (I), which are new, are also useful perfuming and flavouring ingredients.
摘要:
his invention relates to a process for the preparation of an unsaturated macrocyclic ketone of formula which comprises reacting in the presence of a basic reagent a dialdehyde of formula with a diphosphonate of formula wherein each of symbols R represents an alkyl radical.
摘要:
Uaturated ketones of formula possessing two single or two double bonds in the positions indicated by the dotted lines (n = 1 or 2) are prepared by reacting, in the presence of a basic reagent, a dialdehyde of formula wherein the index n and the dotted lines have the above meaning with a diphosphonate of formula wherein R represents an alkyl radical. Compounds of formula (I), which are new, are also useful perfuming and flavouring ingredients.
摘要:
Les composés cétoniques acétyléniques de formule dans laquelle l'un des symboles R représente un radical alkyle contenant de 1 à 3 atomes de carbone et l'autre un atome d'hydrogène, sont préparés par un procédé en trois étapes à partir d'hydrazones de formule dans laquelle le symbole R est défini comme indiqué ci-dessus et A sert à désigner un radical sulfonyle de formule dans laquelle R 1 représente un radical aryle. Les composés cétoniques acétyléniques ainsi préparés sont des intermédiaires utiles pour la préparation de composés carbonylés macrocycliques employés dans la parfumerie.