Six-Membered Cyclic Nitronates as 1,3-Dipoles in Formal [3 + 3]-Cycloaddition with Donor–Acceptor Cyclopropanes. Synthesis of New Type of Bicyclic Nitrosoacetals
Organic Letters2013Vol. 15(2), pp. 350–353
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E.O. Gorbacheva, Andrey A. Tabolin, Роман А. Новиков, Yulia A. Khomutova, Yulia V. Nelyubina, Yury V. Tomilov, Sema L. Ioffe
Abstract
The first formal [3 + 3]-cycloaddition of nitronates with donor-acceptor cyclopropanes is reported. The reaction is catalyzed by ytterbium trifluoromethanesulfonate and leads to hitherto unknown bicyclic nitrosoacetals, possessing two annelated six-membered rings.
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