摘要:
Provided herein are methods for preparing ketone-containing organic molecules. The methods are based on novel iron/copper-mediated ("Fe/Cu-mediated") coupling reactions. The Fe/Cu-mediated coupling reaction can be used in the preparation of complex molecules, such as halichondrins and analogs thereof. In particular, the Fe/Cu-mediated ketolization reactions described herein are useful in the preparation of intermediates en route to halichondrins.
摘要:
本发明提供ATG类似物及其制备方法和应用,ATG类似物的具体结构如下列三个通式所示: 式(I),式(II),式(III) 其中,X/Y/Z可以分别选自C、N、S、O, R 1, R 2, R 3, R 4, R 5 各自分别选自: H,CH 3 基团,脂肪族或者芳香族碳氢化合物基团,硝基,磷酸基,硫化物基团,砜类基团,腈类基团,杂环基,硼酸酯或硼酸基团,酯类基团,胺类基团。本发明所提供的ATG类似物具有更好的水溶性和防止在一级代谢中被分解的效果。
摘要:
La présente invention concerne un adduit entre un acide de Lewis, de préférence le trichlorure d'aluminium, le trichlorure de fer ou le dichlorure de zinc et un hydrosilane, un procédé pour sa préparation et son utilisation dans une réaction de réduction, notamment d'un aldéhyde, d'une cétone, d'une cétone α,β-insaturée, d'une imine, ou d'une imine α,β- insaturée.
摘要:
Process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium using an equipment having at least one surface in contact with the liquid reaction medium, wherein said surface consists of a material selected from glass, polytetrafluoroethylene and nickel based metal alloy.
摘要:
The present invention relates to the use as a preserving agent, in particular in a cosmetic or dermatological composition, of at least one compound of formula (I) in which: X represents =O or -OH; R1 represents a hydrogen atom, a methyl or an ethyl; R2 represents a C1 -C12, saturated or unsaturated, linear hydrocarbon-based radical. The invention also relates to certain novel compounds and to the cosmetic or dermatological compositions comprising same.
摘要:
The invention relates to a process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium comprising an alkenone or a halogenated precursor of the alkenone, and also relates to a process for preparing an alkenone, which comprises (a) reacting a carboxylic acid halide with a vinyl ether by introducing vinyl ether into a liquid reaction medium containing carboxylic acid halide to form a halogenated precursor of the alkenone and (b) eliminating hydrogen halide from said precursor to form the alkenone.
摘要:
Novel perfluoroketone compounds of formula [I] and [Ia] are described Also described are uses thereof, such as for inhibition of phospholipase A2 activity. Therapeutic uses thereof are also described, such as for the treatment of neural conditions and / or inflammatory conditions, such as demeyelmatmg (e.g., multiple sclerosis) and neural injury (e.g., spinal cord injury).