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2005
Aminocarboxylic acids (hydrazinocarboxylic acids) and esters
Q 0440
Stereoselective Enol Tosylation: Preparation of Trisubstituted α,β-Unsaturated
— The selective enolization of keto esters (I) and formation of the correspond20- 078 Esters.
ing enol tosylates is developed. Both (E)-(III) and (Z)-enol tosylate derivatives (IV) undergo efficient cross-coupling reactions with electronically diverse aryl boronic acids
to afford a wide variety of aromatic trisubstituted α,β-unsaturated esters in good to excellent yields. — (BAXTER*, J. M.; STEINHUEBEL, D.; PALUCKI, M.; DAVIES, I.
W.; Org. Lett. 7 (2005) 2, 215-218; Dep. Process Res., Merck Res. Lab., Merck&Co.,
Inc., Rahway, NJ 07065, USA; Eng.) — Steudel
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