Regio- and Diastereoselective Synthesis of Lissoclinolide Analogues by Lewis Acid Catalyzed Cyclization of the First 1,5-Bis(trimethylsilyloxy)-1,3,5-hexatrienes with Oxalyl Chloride
Polysubstituted Oxygen Heterocycles by a Reformatsky-Type Reaction/Reductive Cyclization Approach from Enantiopure β-Ketosulfoxides
作者:Françoise Colobert、Sabine Choppin、Leticia Ferreiro-Mederos、Michel Obringer、Sandra Luengo Arratta、Antonio Urbano、M. Carmen Carreño
DOI:10.1021/ol701670g
日期:2007.10.1
The stereoselective synthesis of tetrasubstituted tetrahydrofurans and trisubstituted tetrahydropyrans bearing a sulfoxide was achieved by reductive cyclization (Et3SiH/TMSOTf) from the corresponding enantiopure hydroxy ketonesprotected as a dioxolane. These derivatives are easily accessible from a Reformatsky-type reaction between alpha-bromo-alpha'-sulfinyl ketones and protected alpha- or beta-ketoaldehydes
6,8,10-UNDECATRIEN-3-ONE OR 6,8,10-UNDECATRIEN-4-ONE, AND AROMA COMPOSITIONS
申请人:Nakanishi Akira
公开号:US20100137648A1
公开(公告)日:2010-06-03
This invention offers 6,8,10-undecatrien-3-one or 6,8,10-undecatrien-4-one which are represented by the following formula (1)
[in the formula, either one of A and B stands for carbonyl group and the other stands for methylene group, and the wavy line signifies cis-form, trans-form, or a mixture of cis- and trans-form at an optional ratio]
and which can reproduce an odor rich in naturality and freshness.
6,8,10-UNDECATRIEN-3-OL OR 6,8,10- UNDECATRIEN-4-OL, AND PERFUME COMPOSITION
申请人:T. Hasegawa Co., Ltd.
公开号:EP2168939A1
公开(公告)日:2010-03-31
This invention offers 6,8,10-undecatrien-3-ol and 6,8,10-undecatrien-4-ol. These compounds possess not only woody green note, but also fruity note rich in naturality and freshness, and aroma compositions blended therewith are useful for imparting fragrance and flavor to food and beverage, perfumed cosmetics, medicaments and the like.