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2004
Halogenation
O 0235
The (Schiff Base)vanadium(V) Complex Catalyzed Oxidation of Bromide —
New Method for the in situ Generation of Bromine and Its Application in the
51- 044 A
Synthesis of Functionalized Cyclic Ethers. — Schiff base derived vanadium(V)
complexes catalyze the oxidation of Br- in non-aqueous solvents with tBu-O-OH as primary oxidant. The in-situ generated Br2 is applicable for the selective transformation
of dihomoallylic alcohols into bromocyclized products with an NBS- or tetrabromocyclododecene-like selectivity. The method is applied to the synthesis of the racemic
2-epimer (VI) of the natural product magnosalicin. — (GREB, M.; HARTUNG*, J.;
KOEHLER, F.; SPEHAR, K.; KLUGE, R.; CSUK, R.; Eur. J. Org. Chem. 2004, 18,
3799-3812; Inst. Org. Chem., Julius-Maximilians-Univ., D-97074 Wuerzburg,
Germany; Eng.) — Kieslich
2004
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