| 摘要 |
The present invention relates to methods for preparing .beta.-ketoester fragrance pro-accords from activated acyl units, 1,3-dioxan-4,6-diones and fragrance raw material alcohols. The first step of the disclosed process involves contacting an activated acyl unit, preferably an acid chloride, with a 1,3-dioxan-4,6-dione, an example of which is Meldrum's acid, to form a 2acyl 1,3-dioxan-4,6-dione which is then reacted with a fragrance raw material alcohol to form the final .beta.-ketoester fragrance pro-accord. The resulting .beta.-ketoester fragrance pro-accords are suitable for use in laundry detergent, personal care, and other formulations wherein aesthetic fragrance materials are employed.
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