据报道,使用Langlois试剂(CF 3 SO 2 Na)通过开环反应,可见光诱导的活化,碳环和非活化乙烯基环丙烷的无金属三氟甲基化反应可合成烯丙基三氟甲基化衍生物。烯丙基三氟甲基化是通过在环境温度和无金属条件下通过光氧化单电子转移(SET)工艺以及使用吡喃鎓盐作为光氧化还原催化剂的可见光照射实现的。所报道的方法具有操作简单,基材范围广,官能团耐受性高和可扩展性的特点。
Purines and pyrimidines having a fused cyclopropane ring in the side chain and the heterocyclic isosteres of said purines and pyrimidines have antiviral activity, especially against viruses of the herpes class.
Trifluoromethylation of vinylcyclopropanes (VCPs) has been developed under mild reaction conditions to synthesize allylic trifluoromethylated derivatives with high yield and E/Z selectivity using visible light photo-redox catalysis and Langlois reagent (CF3SO2Na) as a trifluoromethylation source. Further, we demonstrate a gram scale synthesis procedure for a trifluoromethylation of vinylcyclopropane
乙烯基环丙烷(VCP)的三氟甲基化已开发出来,可以在温和的反应条件下,使用可见光氧化还原催化和朗格洛斯试剂(CF 3 SO 2 Na)作为三氟甲基化源,以高收率和E / Z选择性合成烯丙基三氟甲基化衍生物。此外,我们证明了乙烯基环丙烷的三氟甲基化的克级合成程序。
Pyrimidine derivatives as antiviral compounds
申请人:Merck & Co., Inc.
公开号:US04859680A1
公开(公告)日:1989-08-22
Pyrimidines having a fused cyclopropane ring in the side chain and the heterocyclic isosteres of said pyrimidines, which have antiviral activity, especially against viruses of the herpes class.
A direct nitration of vinylcyclopropanes is disclosed with Cu(NO3)2 and KI in a regio- and stereoselective manner to afford nitroalkenes efficiently, where the cyclopropane skeleton was retained. The given method could be extended to other vinylcycles as well as biomolecule derivatives with wide substrate scope, good functionality tolerance, and efficient synthesis modularity. Further transformations
公开了用 Cu(NO 3 ) 2和 KI 以区域选择性和立体选择性方式对乙烯基环丙烷进行直接硝化,以有效地得到硝基烯烃,其中保留了环丙烷骨架。给定的方法可以扩展到其他乙烯基环以及具有广泛底物范围、良好功能耐受性和高效合成模块化的生物分子衍生物。进一步的转化表明所获得的产品是有机合成中的通用构建块。所提出的离子途径可以解释未接触的小环和反应过程中 KI 的影响。