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The Dieckmann condensation, where a molecule with two ester groups reacts intramolecularly, forming a cyclic β-keto ester. In this case, the ring formed must not be strained, usually a 5- or 6-membered chain or ring. Retro-Claisen condensation is the reverse of the title reaction, i.e., the base-induced cleavage of 2-ketoesters
Oxaloacetic acid (also known as oxalacetic acid or OAA) is a crystalline organic compound with the chemical formula HO 2 CC(O)CH 2 CO 2 H. Oxaloacetic acid, in the form of its conjugate base oxaloacetate, is a metabolic intermediate in many processes that occur in animals.
Thiolases are a family of evolutionarily related enzymes.Two different types of thiolase [4] [5] [6] are found both in eukaryotes and in prokaryotes: acetoacetyl-CoA thiolase (EC 2.3.1.9) and 3-ketoacyl-CoA thiolase (EC 2.3.1.16). 3-ketoacyl-CoA thiolase (also called thiolase I) has a broad chain-length specificity for its substrates and is involved in degradative pathways such as fatty acid ...
Claisen condensation; Claisen rearrangement; Claisen–Schmidt condensation; Clemmensen reduction; Collins reagent; Combes quinoline synthesis; Conia reaction; Conrad–Limpach synthesis; Cook–Heilbron thiazole synthesis; Cope elimination; Cope rearrangement [24] Corey reagent; Corey–Bakshi–Shibata reduction; Corey–Fuchs reaction; Corey ...
Claisen may refer to: Rainer Ludwig Claisen, a German chemist Claisen rearrangement, a reaction of a allyl vinyl ether to a γ,δ-unsaturated carbonyl; Claisen condensation, a reaction between esters and carbonyl compounds in the presence of a strong base; Ireland–Claisen rearrangement, a chemical reaction of an allylic ester with strong base
In enzymology, an oxaloacetase (EC 3.7.1.1) is an enzyme that catalyzes the chemical reaction: [1]. oxaloacetate + H 2 O oxalate + acetate. Thus, the two substrates of this enzyme are oxaloacetate and H 2 O, whereas its two products are oxalate and acetate.
The reaction it catalyzes is: pyruvate + HCO − 3 + ATP → oxaloacetate + ADP + P. It is an important anaplerotic reaction that creates oxaloacetate from pyruvate. PC contains a biotin prosthetic group [1] and is typically localized to the mitochondria in eukaryotes with exceptions to some fungal species such as Aspergillus nidulans which have a cytosolic PC.
This intermediate decomposes by the evolution of nitrogen gas forming the tertiary carbocation intermediate (3). Initial steps in the Buchner–Curtius–Schlotterbeck reaction mechanism The reaction is then completed either by the reformation of the carbonyl through an 1,2-rearrangement or by the formation of the epoxide.