The resulting metabolic shift directs tyrosine metabolism towards the decarboxylation
pathway with unphysiological production of noradrenalin, dopamine together with increased synthesis of amines such as tyramine, octopamine and synephine.
and demethoxylation of naturally occurring phenols during coupling reactions and polymerization.
They are derived from endocrine stem cells of the amine precursor uptake and decarboxylation
(APUD) system, and can potentially cause clinical syndromes due to hypersecretion of biogenic amines and polypeptides.
In Escherichia coli and some other coliforms, lysine decarboxylase is encoded by cadA which participates in the decarboxylation
of lysine and synthesis of cadaverine .
The dominant fragment at m/z 354 is generated by a loss of water from the parent; subsequent decarboxylation
leads to m/z 310.
OH radicals would compete with the decarbonylation or decarboxylation
Polyols with lower homologues of acid could not be made since the high temperatures required resulted in decarboxylation
His dissertation, "The Mechanism of Decarboxylation
of (Alpha-Beta)-and (Beta, Gamma)--Unsaturated Acids," was subsequently published, in part (Journal of the American Chemical Society72: 4359-4361.
My idea was based on how some biological systems achieve decarboxylation
, which means the loss of carbon dioxide.
The desired N-Hpyrazoles resulted from acid hydrolysis and decarboxylation
of these latter compounds.
An early amine precursor uptake and decarboxylation
tumor, however, has extra vesicles and will take up enough MIBG to produce an image on scintigraphy.
6,184,421 B1: Rhodia Chimie researchers have patented a process for preparing a 4-hydroxybenzaldehyde and its derivatives by oxidizing a carboxy group, carrying out a decarboxylation
operation to produce the 4-hydroxybenzaldehyde and a phenol and recycling the phenol.
Acylation, alkylation, alkyl lithium reactions, amidation, bromination, chlorination, cyclization, decarboxylation
, electrochemistry, electrophilic substitution, esterification, fluoride exchange, hydrogenation, nucleophilic substitutions, organometallic reactions, oxidations, palladium catalyzed carbonylation, phase transfer catalysis, photochemistry, reductions, sulfonation, vapor phase catalysis.
As decomposition commences, at temperatures lower than 360[degrees]C, the main degradation reactions for PLLA polyesters are a random nonradical backbiting ester interchange reaction involving OH chain ends, producing mostly cyclic rather than linear oligomers, monomers, acetaldehyde, and carbon dioxide are obtained by decarboxylation
of terminal carboxyl groups in the chains [37, 38].
Petroleum-Forming Reactions: Clay Catalyzed Fatty Acid Decarboxylation