Bicyclic Lactams as Chiral Homoenolate Equivalents: Synthesis of (-)-Penienone
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Waterson, Alex G.,Meyers
p. 7240 - 7243
(2007/10/03)
SUBSTITUTED BUTANOLIDES AND BUTENOLIDES. II. SYNTHESIS OF 3-(2-OXOPROPYL)- AND 3-BUTANOLIDES USING THE REACTION OF 2-BUTENOLIDE WITH CH-ACIDS
The reaction of 2-butenolide with malonate and acetoacetate esters as well as with acetylacetone in the presence of sodium alcoholates proceeds through a step involving the selective addition of the CH-acid anion at C3 of the lactone ring and is accompanied by ring opening.The γ-hydroxyacids formed in acid medium are converted into 3-substituted butanolides, namely, 3-(2-oxopropyl)- and 3-butanolides which had not been described previously.
Naidenov, Yu. V.,Badovskaya, L. A.,Ignatenko, A. V.
p. 1070 - 1072
(2007/10/02)
Studies on ketene and its derivatives. LXXXV. Reactions of 4 bromo 3 hydroxybutanoate and its acyl derivatives
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Kato,Kimura
p. 2692 - 2696
(2007/10/06)
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