Antianaphylactic benzophenones and related compounds
摘要:
The synthesis and biological properties of 85 benzophenones and related compounds are described. The majority of the compounds inhibit the release of leukotrienes (LT) C4 and D4 in vitro from sensitized guinea pig chopped lung. In addition, some of the compounds inhibited the release of LTs from passively sensitized human chopped lung and protected guinea pigs from the effects of anaphylaxis in a modified Herxheimer test.
Fe 3 O 4 @SiO 2 [电子邮件保护] II是通过二氧化硅包覆的磁性纳米颗粒,脲三唑和CoCl 2制备的。这种有机-无机杂化复合物,使用新戊酸酐,K 2 S 2 O 8和PPh 3作为导向基团,对游离酚和萘的区域选择性邻亚磺酰化表现出良好至优异的催化活性。分别用作氧化剂和添加剂。通过使用不同的技术(例如FT-IR,TGA,DTG,TEM,SEM,EDS,ICP和VSM分析)对新合成的催化剂进行了全面表征。与用于C H键活化和官能化的昂贵过渡金属相比,钴具有竞争力的价格,可及性和较低的毒性构成了该方法的宝贵优势。而且,这种多相催化剂可以在五个循环后被磁回收和再利用而不会显着损失其催化活性。
Co(II)-catalyzed regioselective clean and smooth synthesis of 2-(aryl/alkyl-thio)phenols via sp2 C H bond activation
作者:Abed Rostami、Vahid Khakyzadeh、Mohammad Ali Zolfigol、Amin Rostami
DOI:10.1016/j.mcat.2018.04.020
日期:2018.6
The first example of a smooth, practical and useful strategy for the preparation of ortho-aryl/alkyl sulfenyl phenols by using the reaction of aryl/alkyl thiols with phenols in the presence cobalt as catalyst, and with the assistance of acetic anhydride as directing group via CH bond activation, was developed. Described method enables to form selectively CS bond without any ligand, oxidant, and aryl/alkyl