Unwringing the ring: Methylenecyclopropanes reacted with vinyl and aryl Grignard reagents in the presence of a nickel catalyst to afford vinyl‐ and arylmagnesation products, respectively, through a selective CC bondcleavage (see scheme). The reaction provides a new method for the preparation of substituted homoallyl and allyl Grignard reagents.
Mechanistic and exploratory organic photochemistry. LXXXVII. Photochemical rearrangement of 4-aryl-substituted cyclopentenones. Low-temperature photochemistry and direct observation of reaction intermediates
作者:Howard E. Zimmerman、R. Daniel Little
DOI:10.1021/ja00821a044
日期:1974.7
US4937375A
申请人:——
公开号:US4937375A
公开(公告)日:1990-06-26
Complex Polyheterocycles and the Stereochemical Reassignment of Pileamartine A via Aza-Heck Triggered Aryl C–H Functionalization Cascades
作者:Benjamin T. Jones、Javier García-Cárceles、Lewis Caiger、Ian R. Hazelden、Richard J. Lewis、Thomas Langer、John F. Bower
DOI:10.1021/jacs.1c08615
日期:2021.9.29
N-polyheterocycles can be accessed via intramolecular Pd(0)-catalyzed alkene 1,2-aminoarylation reactions. The method uses N-(pentafluorobenzoyloxy)carbamates as the initiating motif, and this allows aza-Heck-type alkene amino-palladation in advance of C–H palladation of the aromatic component. The chemistry is showcased in the first total synthesis of the complex alkaloid (+)-pileamartine A, which has resulted in