One-Pot Preparation of (<i>E</i>)-α,β-Unsaturated Aldehydes by a Julia–Kocienski Reaction of 2,2-Dimethoxyethyl PT Sulfone Followed by Acid Hydrolysis
作者:Kaori Ando、Haruka Watanabe、Xiaoxian Zhu
DOI:10.1021/acs.joc.1c00479
日期:2021.5.7
(E)-α,β-Unsaturatedaldehydes were synthesized by the Julia–Kocienski reaction of 2,2-dimethoxyethyl 1-phenyl-1H-tetrazol-5-yl (PT) sulfone 3 with various aldehydes, followed by acid hydrolysis. The reaction could be carried out in one pot, and various (E)-α,β-unsaturatedaldehydes were obtained in a short time and with high yields.
The present invention relates to: a novel dienal compound which has an aromatic odor useful for use as a compound flavor raw material or the like; and a flavor composition containing the dienal compound. The dienal compound according to the present invention is characterized by being represented by general formula (1):
(wherein R represents an alkyl group having 8 to 10 carbon atoms; and a wavy line represents a cis form, a trans form, or a mixture of a cis form and a trans form).
PRODUCTION OF FATTY OLEFIN DERIVATIVES VIA OLEFIN METATHESIS
申请人:PROVIVI, INC.
公开号:US20170137365A1
公开(公告)日:2017-05-18
In one aspect, the invention provides a method for synthesizing a fatty olefin derivative. The method includes: a) contacting an olefin according to Formula I
with a metathesis reaction partner according to Formula IIb
in the presence of a metathesis catalyst under conditions sufficient to form a metathesis product according to Formula IIIb:
and
b) converting the metathesis product to the fatty olefin derivative. Each R
1
is independently selected from H, C
1-18
alkyl, and C
2-18
alkenyl; R
2b
is C
1-8
alkyl; subscript y is an integer ranging from 0 to 17; and subscript z is an integer ranging from 0 to 17. In certain embodiments, the metathesis catalyst is a tungsten catalyst or a molybdenum catalyst. In various embodiments, the fatty olefin derivative is a pheromone. Pheromone compositions and methods of using them are also described.
The present disclosure provides pheromone compositions. In some aspects, the compositions taught herein comprise a pheromone chemically corresponding to the pheromone naturally produced by a given insect, along with at least one positional isomer of said pheromone. In various aspects, pheromone compositions of the present disclosure are able to modulate the response of the insect based on the ratio of natural pheromone to its positional isomer.
[EN] FRAGRANCE AND FLAVOR COMPOSITIONS CONTAINING ISOMERIC ALKADIENALS OR ISOMERIC ALKADIENENITRILES<br/>[FR] COMPOSITION AROMATISÉE OU PARFUMÉE CONTENANT DES ALCADIÉNALS ISOMÈRES OU DES ALCADIÈNENITRILES ISOMÈRES
申请人:BEDOUKIAN RES INC
公开号:WO2017100426A1
公开(公告)日:2017-06-15
A composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A fragrance or flavor composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A consumer product containing the fragrance or flavor composition having at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A method of imparting a fragrance or flavor to a consumer product by adding to the consumer product a fragrance or flavor composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the consumer product.