The antiviral marine natural product (-)-hennoxazole A was efficiently synthesized by a convergent approach. The stereoselective synthesis of the functionalized tetrahydropyran fragment was accomplished by the Mukaiyama aldol reaction, chelation-controlled 1,3-syn reduction, Wacker oxidation, and acid catalyzed intramolecular ketalization. The nonconjugated triene fragment was synthesized by S(N)2 displacement of an allylic bromide with vinyllithium and the CrCl2-mediated iodoolefination followed by palladium-catalyzed cross coupling with MeMgBr. The final steps include the fragment coupling using DEPC and oxazole synthesis via an oxidation/cyclodehydration process. (C) 2001 Elsevier Science Ltd. All rights reserved.
Sulfonamides having antiangiogenic and anticancer activity
申请人:——
公开号:US20040167128A1
公开(公告)日:2004-08-26
Compounds having methionine aminopeptidase-2 inhibitory (MetAP2) are described. Also described are pharmaceutical compositions comprising the compounds, methods of treatment using the compounds, methods of inhibiting angiogenesis, and methods of treating cancer.