The present invention provides a gel composition having improved texture in use. A gel composition consisting of an organosiloxane derivative represented by the following formula (1) or (3), a monohydric aliphatic alcohol having 10 to 30 carbon atoms, and water.
An oil-in-water emulsion cosmetic composition is provided. The oil-in-water emulsion cosmetic composition comprises a carboxylic acid modified silicone (A) that has a specific chemical structure and is liquid at room temperature, an oil agent (B), and water (C). The oil-in-water emulsion cosmetic composition can provide a cosmetic film with high stability and excellent water resistance.
A cosmetic composition is provided. The cosmetic composition comprises a carboxylic acid modified silicone (A) that has a specific chemical structure and is liquid at room temperature. The cosmetic composition also comprises an oil agent (B). The cosmetic composition generally provides a cosmetic film having excellent water resistance, and can be easily removed by normal soap and water.
It was found that, in the presence of a catalytic amount of sulfuric acid, hexamethyldisiloxane silylates carboxylic acids to give trimethylsilyl carboxylates in good yields.
研究发现,在催化量的硫酸存在下,六甲基二硅氧烷可以将羧酸硅化,产生良好产率的三甲基硅基羧酸酯。
Enantioselective Total Synthesis of Antibiotic CJ-16,264, Synthesis and Biological Evaluation of Designed Analogues, and Discovery of Highly Potent and Simpler Antibacterial Agents
作者:K. C. Nicolaou、Kiran Kumar Pulukuri、Stephan Rigol、Marek Buchman、Akshay A. Shah、Nicholas Cen、Megan D. McCurry、Kathryn Beabout、Yousif Shamoo
DOI:10.1021/jacs.7b08749
日期:2017.11.8
An improved and enantioselective total synthesis of antibiotic CJ-16,264 through a practical kinetic resolution and an iodolactonization reaction to form the iodo pyrrolizidinone fragment of the molecule is described. A series of racemic and enantiopure analogues of CJ-16,264 was designed and synthesized through the developed synthetic technologies and tested against drug-resistant bacterial strains