Novel substituted 1,3-dihydrospiro[isobenzofuran]s and methods of preparing the same are described. These compounds are useful as antidepressants, tranquilizers, analgetic agents and intermediates therefor.
A visible light‐induced photocatalytic radical addition/cyclization reaction of o‐vinyl‐N‐alkoxybenzamides has been accomplished for efficient synthesis of diversely functionalized CF3‐containing iminoisobenzofurans. This external oxidant‐free and mild protocol features ready availability of starting materials, excellent regioselectivity, good substrate scope and functional group tolerance.
Synthesis of Dibenzo[<i>b</i>,<i>f</i>]azepines via Palladium‐Catalyzed Cascade [4 + 3] Annulation of <i>o</i>‐Alkenyl Bromoarenes and <i>o</i>‐Bromoaniline Derivatives
A cascade [4+3] annulation of o-alkenyl bromoarenes and o-bromoaniline derivatives was described. Various dibenzo[b,f]azepines with substitutions on the 10/11 position were obtained in 14–97% yields. The synthetic versatility of this protocol is highlighted by the preparation of a precursor of the drug molecule oxcarbazepine, a gram-scale synthesis, and two product transformations. Unlike previous
描述了邻-烯基溴芳烃和邻-溴苯胺衍生物的级联[ 4+3]环化。获得了在 10/11 位点上有取代的各种二苯并[ b , f ]氮杂卓化合物,产率为 14-97%。该方案的合成多功能性通过药物分子奥卡西平前体的制备、克级合成和两种产品转化来突出。与之前的胺化/Heck 序列不同,该级联过程应该经历 C(乙烯基)、C(芳基)-钯环参与途径。
Copper‐Catalyzed Aerobic Benzylic C(sp3)−H Oxidation of Unprotected Aniline Derivatives for the Synthesis of Phenanthridines
Herein, we report a copper‐catalyzed intramolecular benzylic C(sp3)−H oxidation of unprotected aniline derivatives under aerobic conditions, which enables the preparation of phenanthridine compounds. To the best of our knowledge, this is the pioneering reaction of dehydrogenative C(sp3)−N bond formation from unprotected anilines under a Cu/O2 system. Notably, various anilines possessing alkyl, methoxy