Sequential C–H and C–C Bond Cleavage: Divergent Constructions of Fused <i>N</i>-Heterocycles via Tunable Cascade
作者:Xianwei Li、Jianhang Rao、Wensen Ouyang、Qian Chen、Ning Cai、Yu-Jing Lu、Yanping Huo
DOI:10.1021/acscatal.9b03091
日期:2019.9.6
multiple cascade reactions for the divergent assembly of fused N-heterocycles, comprising sequential activation of C–H and C–C bonds. Isolatable indene-type intermediates might be responsible for the generation of densely substituted fused pyridines, azepines, and azafluorenones products. The tolerance of stronglycoordinatingN-heterocycles, and those readily applicable for the late-stage modifications
Spiro-tricyclicaromatic succinimide derivatives as inhibitors of aldose
申请人:Alcon Laboratories, Inc.
公开号:US05153211A1
公开(公告)日:1992-10-06
Disclosed are substituted or unsubstituted planar tricyclic fluorene or nuclear analogs thereof, spiro-coupled to a five-membered ring containing a secondary amide, and the pharmaceutically acceptable salts thereof. These compounds are useful, inter alia in the treatment of diabetes. Also disclosed are processes for the preparation of such compounds; pharmaceutical compositions comprising such compounds; and methods of treatment comprising administering such compounds and compositions when indicated for, inter alia, long term, prophylactic treatment of the diabetes syndrome. A particularly preferred class of compounds comprise difluoro-dialkoxy substituted spiro-(9H-fluorene-9,4'-imidazolidine)-2',5-diones.