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2005
Pyridine derivatives
R 0380
Ligand Effects in the Rh(II) Catalyzed Reaction of α-Diazo Ketoamides. — It is
that the results of the decomposition concerning the functionalized diazo12- 144 discovered,
acetate (I) completely depend on the Rh(II)-catalyst used. With pivalate the expected
cycloadduct (II) is obtained, whereas perfluorobutyrate produces the lactam (III). The
latter reaction can be generalized to the simpler diazoacetate (IV). In order to further
clarify the regiochemistry of the reaction, the decomposition of diazoacetate (VI) in the
presence of different Rh(II)-catalysts is investigated. — (MEJIA-ONETO, J. M.;
PADWA*, A.; Tetrahedron Lett. 45 (2004) 49, 9115-9118; Dep. Chem., Emory Univ.,
Atlanta, GA 30322, USA; Eng.) — Mais
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