1.4 Metal-Catalyzed Intramolecular Cyclizations Involving Cyclopropane and Cyclopropene Ring Opening
Book
Editors: Gao, S.; Ma, S.
Title: Metal-Catalyzed Cyclization Reactions 1
Print ISBN: 9783131998613; Online ISBN: 9783132403406; Book DOI: 10.1055/b-003-129294
1st edition © 2016 Georg Thieme Verlag KG
Georg Thieme Verlag, Stuttgart
Subjects: Organic Chemistry;Chemical Reactions, Catalysis;Organometallic Chemistry;Laboratory Techniques, Stoichiometry
Science of Synthesis Reference Libraries
Parent publication
Title: Science of Synthesis
DOI: 10.1055/b-00000101
Series Editors: Carreira, E. M.; Decicco, C. P.; Fürstner, A.; Koch, G.; Molander, G.; Schaumann, E.; Shibasaki, M.; Thomas, E. J.; Trost, B. M.
Type: Multivolume Edition
Abstract
Due to the ring strain of cyclopropane rings, transition-metal catalysts can easily undergo an oxidative addition with the cyclopropane moiety of methylenecyclopropanes (MCPs) to give trimethylenemethane (TMM) intermediates. Subsequent intramolecular cyclization with unsaturated systems takes place to give cyclized products. Moreover, in the presence of a chiral ligand, high enantioselectivity can be achieved. The ring-fused products are versatile building blocks in organic synthesis.
Key words
cyclopropanes - methylenecyclopropanes - ring-opening reactions - cyclization - alkenes - alkynes - transition-metal catalysts - trimethylenemethanes - palladium - nickel - rhodium - ruthenium - chiral synthesis- 59 Tomilov Yu. V, Shapiro EA, Protopopova MN, Ioffe AI, Dolgii IE, Nefedov OM. Izv. Akad. Nauk SSSR, Ser. Khim. 1985; 631 Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.) 1985; 34: 576