Synthesis of indolidines by the 1,3-dipolar cycloaddition of azides with methylenecyclopropanes followed by cyclopropyumine rearrangement
作者:Philip C. Heidt.‡、Stephen C. Bergmeier†、WilliAm H. Pearson‡
DOI:10.1016/s0040-4039(00)97867-5
日期:1990.1
Cyclic imines 6a and 6b were obtained by the intramolecular 1,3-dipolar cycloaddition of azides with methylenecyclopropanes. Acid catalyzed rearrangement produced bicyclic (−)-enamines 7, which upon reduction provided indoilizidenes 8. A similar strategy was used for the synthesis of (−)-8a-epi-desacctoxyslaframine 16.
HEIDT, PHILIP C.;BERGMEIER, STEPHEN C.;PEARSON, WILLIAM H., TETRAHEDRON LETT., 31,(1990) N8, C. 5441-5444
作者:HEIDT, PHILIP C.、BERGMEIER, STEPHEN C.、PEARSON, WILLIAM H.
DOI:——
日期:——
US7994164B2
申请人:——
公开号:US7994164B2
公开(公告)日:2011-08-09
Organolanthanide-Catalyzed Intra- and Intermolecular Tandem C−N and C−C Bond-Forming Processes of Aminodialkenes, Aminodialkynes, Aminoalkeneynes, and Aminoalkynes. New Regiospecific Approaches to Pyrrolizidine, Indolizidine, Pyrrole, and Pyrazine Skeletons
作者:Yanwu Li、Tobin J. Marks
DOI:10.1021/ja972643t
日期:1998.3.1
contribution describes catalytic tandem C−N and C−C bond-forming reactions involving the intramolecular hydroamination/bicyclization and intermolecular hydroamination/cyclization of olefins and alkynes using the organolanthanide complexes Cp‘2LnCH(SiMe3)2 and Me2SiCp‘‘2LnCH(SiMe3)2 (Cp‘ = η5-Me5C5; Cp‘‘ = η5-Me4C5; Ln = lanthanide) as precatalysts. In the case of the intramolecular processes, substrates of