Tetrahedron p. 4947 - 4954 (1984)
Update date:2022-07-29
Topics:
Dreme, M.
Brunel, S.
Perchec, P. Le
Garapon, J.
Sillion, B.
Cyclo 1,3-oxoimminium salts are found to react regiospecifically with functional carbanions.Steric effects induced at the C-2 site on salts or at the carbanionic centers promote the condensation at the C-5 or C-6 opposite sites.A bulky substituent such as 2-mesityl group is a powerful auxiliary which not only modifies the steric environment at the reactive C-2 site but also contributes to enhance the reactivity of the cyclo oxoimminium ring.
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