Studies on Antifungal Agents. Part 22. 3-aryl-5-[(aryloxy)alkyl]-3-[(1H-imidazol-1-yl)methyl]-2-methylisoxazolidines and related derivatives
作者:George B. Mullen、Patricia A. Swift、David M. Marinyak、Stanley D. Allen、Jeffrey T. Mitchell、C. Richard Kinsolving、Vassil St. Georgiev
DOI:10.1002/hlca.19880710406
日期:1988.6.15
The synthesis and antifungalactivity of a novel series of 3-aryl-5-[(aryloxy)alkyl]-3-[(1H-imidazol-1-yl)-methyl]-2-methylisoxazolidines and related compounds, are discussed. The synthesis of the title compounds was accomplished via a 1,3-dipolar cycloaddition of α-substituted ketonitrones with l-alkenyl phenyl ethers (Scheme 2 and 3). The compounds were evaluated for in vitro antifungalactivity in
Iodotrifluoromethylation of Alkenes and Alkynes with Sodium Trifluoromethanesulfinate and Iodine Pentoxide
作者:Zhaojia Hang、Zejiang Li、Zhong-Quan Liu
DOI:10.1021/ol501380e
日期:2014.7.18
A scalable, selective, and operationally easy iodotrifluoromethylation of a wide range of alkenes and alkynes by using two simple and safe solids, sodiumtrifluoromethanesulfinate and iodine pentoxide, in aqueous medium has been developed. Mechanistic studies confirm that free-radical processes are involved in this system since the key radical intermediates such as CF3 and β-CF3 alkyl radicals have
Palladium-Catalyzed Intermolecular Ditrifluoromethoxylation of Unactivated Alkenes: CF<sub>3</sub>O-Palladation Initiated by Pd(IV)
作者:Chaohuang Chen、Yixin Luo、Liang Fu、Pinhong Chen、Yu Lan、Guosheng Liu
DOI:10.1021/jacs.7b11470
日期:2018.1.31
A novel palladium-catalyzedintermolecular ditrifluoromethoxylation of unactivatedalkenes has been developed, using a new electrophilic reagent, SelectfluorCN, as a strong oxidant, and AgOCF3 as a trifluoromethoxide source. Preliminary mechanistic studies revealed that the reaction was possibly initiated by Pd(IV) species, and an unusual cis-addition of CF3O-Pd(IV) into the double bond leads to the
Regioselective Chlorothiolation of Alkenes with Sulfonyl Chlorides
作者:Jingjing Wei、Shuaishuai Liang、Lvqi Jiang、Yasir Mumtaz、Wen-bin Yi
DOI:10.1021/acs.joc.9b02920
日期:2020.1.17
Newly developed sulfonyl chloride-based regioselective chlorothiolation of alkenes has been disclosed; the reaction is compatible with a variety of functional groups and can be scaled up to the gram scale with no loss in yield. The employment of readily available reactants, mild reaction conditions, and high regioselectivity makes this process very practical. Mechanistic studies revealed a possible
Copper-Catalyzed Bromodifluoroacetylation of Alkenes with Ethyl Bromodifluoroacetate
作者:Dengke Li、Tingting Mao、Jinbo Huang、Qiang Zhu
DOI:10.1021/acs.joc.8b01434
日期:2018.9.7
ethyl bromodifluoroacetate (BrCF2CO2Et) as a difluoroacetylating reagent, has been disclosed. The reaction proceeds under mild conditions, and possible byproducts generated from hydrodifluoroacetylation and/or direct alkenyl C–H difluoroacetylation are not observed. Mechanistic studies confirm that the atom transfer radical addition (ATRA) process is involved in this alkene difunctionalization reaction
已经公开了使用溴二氟乙酸乙酯(BrCF 2 CO 2 Et)作为二氟乙酰化试剂的Cu催化的烯烃的区域选择性溴二氟乙酰化。该反应在温和的条件下进行,未观察到氢二氟乙酰化和/或直接烯基CH二氟乙酰化产生的副产物。机理研究证实,该烯烃双官能化反应涉及原子转移自由基加成(ATRA)过程。