三重奏有助于激活醇中的 CH 键酶可以通过位置良好的 H 键激活分子的特定部分来加速化学反应。杰弗里等人。在合成环境中展示氢键的力量。在这里,醇的 C 中心的反应性是通过使用 H 键催化剂来结合醇的羟基而选择性地诱导的。相邻的 CH 键现在变得容易受到另一对催化剂加速的反应的影响。组合起来,这三种催化剂促进了在一系列竞争位点内的醇 C 处形成 CC 键。科学,这个问题 p。1532 氢键在醇和烯烃之间的碳-碳键形成反应中赋予位点选择性。在存在多个潜在的氢原子供体和受体的情况下,从有机分子转移氢原子的效率和选择性通常难以控制。在这里,我们描述了一种催化活化模式的机理评估,该模式通过氢原子转移机制实现了醇与丙烯酸甲酯的高选择性光氧化还原 α-烷基化/内酯化。我们的研究表明,在烯丙基、苄基、α-C=O 和 α-醚 C-H 键存在的情况下,四正丁基磷酸铵在提高醇中 α C-H 键的选择性方面具有特
The present application relates to encapsulates, compositions, products comprising such encapsulates, and processes for making and using such encapsulates. Such encapsulates comprise a core comprising a perfume and a shell that encapsulates said core, such encapsulates may optionally comprise a parametric balancing agent, such shell comprising one or more azobenzene moieties.
The ruthenium pincer-catalyzed synthesis of γ-butyrolactones from 1,2-diols and malonates using borrowing-hydrogen methodology is reported.
本文报道了使用借氢方法,通过钌夹钳催化从1,2-二醇和丙二酸酯合成γ-丁内酯的过程。
FLAVOR MODULATOR HAVING PYRIDINE DERIVATIVE OR SALT THEREOF AS ACTIVE INGREDIENT
申请人:T. HASEGAWA CO., LTD.
公开号:US20180072670A1
公开(公告)日:2018-03-15
2-(phenylalkyloxyalkyl)pyridine derivative or a 2-(phenylalkylthioalkyl)pyridine derivative imparts, when added to food and drink or cosmetics as an active ingredient, a flavor of natural impression thereto; and in particular, when added to food and drink, the compound imparts an umami imparting or enhancing, a saltiness enhancing a sweetness enhancing, and in particular, when added to a milk or dairy product, a food or drink product containing a milk or dairy product, or a dairy replacement product, the compound provides a milk richness enhancing.
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.
NOVEL ALKANETHIOIC ACID DERIVATIVE AND PERFUME COMPOSITION CONTAINING THE SAME
申请人:T. HASEGAWA CO., LTD.
公开号:US20200290958A1
公开(公告)日:2020-09-17
An alkanethioic acid derivative capable of imparting a characteristic aroma or flavor to fragrances and cosmetics, and foods and beverages; and a perfume composition comprising the alkanethioic acid derivative as an active ingredient. S-alkyl 5-[(1-alkoxy)ethoxy]alkanethioate represented by formula (1), and a perfume composition comprising the S-alkyl 5-[(1-alkoxy)ethoxy]alkanethioate represented by formula (1) as an active ingredient. In the formula (1), R
1
represents an alkyl group having 1 to 9 carbon atoms, R2 represents an alkyl group having 2 to 4 carbon atoms, and R3 represents a methyl group or an ethyl group.