The present study reports the asymmetric cyclization of enals with vinylcyclopropane azlactones efficiently catalyzed by the combination of achiral Pd(0) complexes and chiral secondary amines. Corresponding spirocyclic azlactones were produced in high yields with moderate diastereoselectivities and excellent enantioselectivities. This protocol provides an efficient and easily-performed route to spirocyclic
Synthetic studies of carzinophilin. Part 2: Synthesis of 3,4-dibenzyloxy-2-methylidene-1-azabicyclo[3.1.0]hexane systems corresponding to the C1–C17 fragment of carzinophilin
A model compound bearing the C1–C17 fragment of carzinophilin was synthesized. The synthesis involved coupling reaction of a cyclic thioimidate with the 4H-oxazol-5-one derivative, ring-opening of the 4H-oxazol-5-one to furnish a dehydropeptide system, elaboration of the C1–C6 enolamide, and construction of the aziridine ring as key steps.
Pd-catalyzed C–N bond cleavage strategy for the cycloaddition of pyrrolidines with azlactones or butenolides to construct the azepines. Leverage of the readily accessible 3-alkylidenepyrrolidine can serve as an effective precursor for zwitterionic salts. The in situ formation of an allyl-palladium intermediate through the cleavage of inert, cyclic C–N bonds leads to a cascade [5 + 2] cycloaddition, which allows
PLASMINOGEN ACTIVATOR INHIBITOR-1 INHIBITORS AND METHODS OF USE THEREOF
申请人:THE REGENTS OF THE UNIVERSITY OF MICHIGAN
公开号:US20150315178A1
公开(公告)日:2015-11-05
The invention relates to plasminogen activator-1 (PAI-1) inhibitor compounds and uses thereof in the treatment of any disease or disorder associated with elevated PAI-1. The invention includes, but is not limited to, the use of such compounds to prevent or reduce thrombosis and fibrosis, to promote thrombolysis, and to modulate lipid metabolism and treat diseases or disorders associated with elevated PAI-1, cholesterol, or lipid levels.