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2005
Ring closure reactions
O 0130
Palladium-Catalyzed Carbon—Carbon Bond-Forming 1,2-Ligand Migration of
Organoalanes. — Reaction of the alkyne (I) with AlMe3 followed by treatment with
15- 038 Pd(PPh
3)4 gives a mixture of four cyclized products including target compound (VII).
In contrast, complete conversion into the desired products (IX) is observed in the presence of PdCl2(P(p-anisyl) 3)2. Only small amounts of other bi- and tricycles are formed
under these optimized conditions. — (FILLION*, E.; CARSON, R. J.; TREPANIER,
V. E.; GOLL, J. M.; REMOROVA, A. A.; J. Am. Chem. Soc. 126 (2004) 47,
15354-15355; Dep. Chem., Univ. Waterloo, Waterloo, Ont. N2L 3G1, Can.; Eng.) —
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