An asymmetric hydrogenation of sterically hindered β,β-disubstituted enones has been well-established by using a ruthenium complex composed of an achiral diphosphane and a chiral diamine as catalyst, wherein the carbonyl group was selectively hydrogenated to give a wide range of chiral allylic alcohols with high levels of enantioselectivity and complete chemoselectivity.
BITTER TASTE MODIFIERS INCLUDING SUBSTITUTED 1-BENZYL-3-(1-(ISOXAZOL-4-YLMETHYL)-1H-PYRAZOL-4-YL)IMIDAZOLIDINE-2,4-DIONES AND COMPOSITIONS THEREOF
申请人:SENOMYX, INC.
公开号:US20160376263A1
公开(公告)日:2016-12-29
The present invention includes compounds and compositions known to modify the perception of bitter taste, and combinations of said compositions and compounds with additional compositions, compounds, and products. Exemplary compositions comprise one or more of the following: cooling agents; inactive drug ingredients; active pharmaceutical ingredients; food additives or foodstuffs; flavorants, or flavor enhancers; food or beverage products; bitter compounds; sweeteners; bitterants; sour flavorants; salty flavorants; umami flavorants; plant or animal products; compounds known to be used in pet care products; compounds known to be used in personal care products; compounds known to be used in home products; pharmaceutical preparations; topical preparations; cannabis-derived or cannabis-related products; compounds known to be used in oral care products; beverages; scents, perfumes, or odorants; compounds known to be used in consumer products; silicone compounds; abrasives; surfactants; warming agents; smoking articles; fats, oils, or emulsions; and/or probiotic bacteria or supplements.
Palladium(0)-catalyzed isomerization of α,β-epoxy ketones to β-diketones
作者:M. Suzuki、A. Watanabe、R. Noyori
DOI:10.1002/recl.19881070324
日期:——
In the presence of catalytic amounts of tetrakis(triphenylphosphine)palladium(0) and 1,2-bis(diphenylphosphino)ethane, α,β-epoxyketones isomerize to the corresponding β-diketones in high yields. Both open-chain and cyclic substrates can be used. Possible reaction mechanisms are discussed.
COMPOSITIONS OF ALKYLAMIDOTHIAZOLES AND FRAGRANCES
申请人:BEIERSDORF AG
公开号:US20160015613A1
公开(公告)日:2016-01-21
Disclosed are active ingredient combinations of alkylamidothiazoles and one or more cosmetically or dermatologically relevant fragrances.
揭示了烷基酰胺噻唑酮和一种或多种在化妆品或皮肤科学方面相关的香料的活性成分组合。
An Atom-Economic and Selective Ruthenium-Catalyzed Redox Isomerization of Propargylic Alcohols. An Efficient Strategy for the Synthesis of Leukotrienes
作者:Barry M. Trost、Robert C. Livingston
DOI:10.1021/ja804105m
日期:2008.9.10
secondary propargylicalcohols in good yields to provide trans enals and enones exclusively. Readily available indenylbis(triphenylphosphine)ruthenium chloride, in the presence of indium triflate and camphorsulfonic acid, gives the best turnover numbers and reactivity with the broadest range of substrates. Deuterium labeling experiments suggest that the process occurs through propargylic hydride migration