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Autor:
Reiner Anwander, Daniel Werner
Publikováno v:
Journal of the American Chemical Society. 140:14334-14341
The elusive Takai olefination reagent, namely, the iodo-methylidene Cr(III) complex [Cr2Cl4(CHI)(thf)4], has been isolated by careful handling of the reaction between CrCl2 and CHI3 in THF at −35 °C. Alternatively, treatment of [Cr(OSi(OtBu)3)2] w
Autor:
R. W. Nagorski, John P. Richard
Publikováno v:
Journal of the American Chemical Society. 121:4763-4770
The lyoxide ion catalyzed intramolecular aldol addition reaction of 2-(2-oxopropyl)benzaldehyde (1) to give the aldol adduct 3 proceeds via essentially irreversible formation of the acetone-like enolate intermediate 2, because reprotonation of 2 by a