期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 34, 页码 11997-12001出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201602755
关键词
alkynes; annulation; donor-acceptor cyclopropanes; Lewis acids; polycycles
资金
- Swiss National Science Foundation
Efficient methods for the convergent synthesis of (poly) cyclic scaffolds are urgently needed in synthetic and medicinal chemistry. Herein, we describe new annulation reactions of thioalkynes with phthalimide-substituted donor-acceptor cyclopropanes, which gave access to highly substituted cyclopentenes and polycyclic ring systems. With silyl-thioalkynes, the Lewis acid catalyzed[3+2] annulation reaction with donor-acceptor cyclopropanes took place to afford 1-thio-cyclopenten-3-amines. On the other hand, an unprecedented polycyclic compound was formed with alkyl-thioalkynes through a reaction pathway directly involving the phthalimide group. The two transformations proceeded in good yields and tolerated a large variety of functional groups.
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