Subjection of N-alkenylimides to Kulinkovich cyclopropanation conditions led to different types of N,O-acetals, which were used as precursors
for tertiary N-acyliminium ion chemistry. In this way, a variety of bi- and tricyclic lactams were efficiently synthesized.
Stereoselective carbon-carbon bond formation via allylic N-sulfonyliminium ionsHopman, J.C.P.; van den Berg, E.; Olero Olero, L.; Hiemstra, H.; Speckamp, W.N.
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Download date: 09 May 2018Pergamon 0(M0-4039(95)00748-2Tetrahedron Letters, Vol. 36, No. 24, pp. 4315-4318, 1995 Abstract: N-Tosyl-6-alkoxy-2,6-dihydro-IH-pyridin-3-ones 1 were found to react stereoselecfively with various nucleophiles under the influence of BF3.OEt2 yielding 2,6-c/s-disubstituted dihydmpyfidinones.
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