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Showing 1-25 of 25 results for "63380" within Papers
Reiko Fujita et al.
Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 126(2), 109-116 (2006-02-08)
The carbon-carbon bond-forming reactions of 1-methyl-2-methylthiophenylpyridinium iodides with active methylene compounds (such as dimethyl malonate, malononitrile) using NaH as a base gave the 2-substituted methylene-1,2-dihydropyridine derivatives.
H Dongmei et al.
Preparative biochemistry & biotechnology, 30(3), 231-240 (2000-08-05)
5-Methoxytryptamine and L-tryptophan methyl ester were acylated with malonic acid, dimethyl malonate, or succinic anhydride to produce the corresponding N,N'-dicarbonyltryptamine derivatives. The analgesic activity was evaluated by the tail flick test. All of the compounds exhibited desirable analgesic potency. This
R Padmakumar et al.
Analytical biochemistry, 214(1), 318-320 (1993-10-01)
A rapid and high-yield synthesis of methylmalonyl coenzyme A is reported. The two-step procedure involves preparation of the thiophenyl ester of methylmalonic acid using dicyclohexylcarbodiimide as a condensing agent, followed by transesterification with coenzyme A, to yield methylmalonyl coenzyme A
B A McLaughlin et al.
Journal of neurochemistry, 70(6), 2406-2415 (1998-05-29)
Intrastriatal injections of the mitochondrial toxins malonate and 3-nitropropionic acid produce selective cell death similar to that seen in transient ischemia and Huntington's disease. The extent of cell death can be attenuated by pharmacological or surgical blockade of cortical glutamatergic
Violeta Iosub et al.
The Journal of organic chemistry, 75(5), 1612-1619 (2010-02-06)
A convenient and versatile enantioselective synthesis of biologically important alpha-quaternary amino acid derivatives was based on the sequential double alkylation or arylation of dimethyl malonate, followed by desymmetrization with porcine liver esterase (PLE) and Curtius rearrangement. The PLE-mediated hydrolysis of
Jeroen S Dickschat et al.
Chembiochem : a European journal of chemical biology, 5(6), 778-787 (2004-06-03)
The volatiles emitted from cell cultures of myxobacterium Myxococcus xanthus were collected by use of a closed-loop stripping apparatus (CLSA) and analyzed by GC-MS. Two new natural products, (S)-9-methyldecan-3-ol ((S)-1) and 9-methyldecan-3-one (2), were identified and synthesized, together with other
P Gimsing et al.
American journal of hematology, 49(2), 121-130 (1995-06-01)
The cobalamin metabolism in chronic myelogenous leukemia (CML) was evaluated in 18 newly diagnosed and untreated patients by formiminoglutamic acid (FiGlu) and methyl malonic acid excretion (MMA) tests. A deoxyuridine (dU) suppression test of bone marrow cells was compared in
Enantioselective modular synthesis of 2,4-disubstituted cyclopentenones by iridium-catalyzed allylic alkylation.
Mathias Schelwies et al.
Angewandte Chemie (International ed. in English), 45(15), 2466-2469 (2006-03-10)
A Martínez Bermejo et al.
Revista de neurologia, 33(2), 101-111 (2001-09-20)
The presence in neuroimaging of areas of symmetrical bilateral hypodensity in the basal ganglia (SBHBG) is a striking and unusual finding. To determine the aetiology, clinical significance and evolution of a group of paediatric patients with SBHBG. We made a
Catalytic oxidative decarboxylation of malic acid into dimethyl malonate in methanol with dioxygen.
Junxia Liu et al.
ChemSusChem, 5(11), 2151-2154 (2012-10-12)
Kerstin Herold et al.
Organic & biomolecular chemistry, 2(17), 2411-2414 (2004-08-25)
Cervimycin C is the major component of an antibiotic complex produced by Streptomyces tendae HKI-179 consisting of a tetracycline-type aglycon, six tridesoxysugars and a rare dimethylmalonyl moiety. The biosynthetic origin of cervimycin was studied by molecular studies and feeding experiments
DNA-based catalytic enantioselective michael reactions in water.
David Coquière et al.
Angewandte Chemie (International ed. in English), 46(48), 9308-9311 (2007-10-31)
G B MacPhee et al.
Archives of disease in childhood, 69(4), 433-436 (1993-10-01)
Two new cases of malonyl coenzyme A (CoA) decarboxylase deficiency are described. Hitherto, the worldwide experience of the disorder has been confined to reports on two affected Australian children. The new cases are Scots born and are the offspring of
Shinji Kato
Journal of the American Chemical Society, 127(33), 11538-11539 (2005-08-18)
Layer-by-layer (LbL) assembly of triarylamine (TAA)-containing polymers has been applied for anode functionalizations in organic light-emitting diodes (OLEDs). Surface work function of the ITO electrodes was significantly altered with the functionalizations, and the values changed depending on electron affinity of
S Sun et al.
Biochemistry, 37(11), 3876-3885 (1998-04-02)
The pre-steady-state kinetics of the half-reactions of several substrates with dialkylglycine decarboxylase are examined by multiwavelength kinetics and global analysis. The substrates examined fall into two groups: those that exhibit simple, monophasic kinetics and those that exhibit biphasic kinetics. The
G Y Choi et al.
Proceedings of the National Academy of Sciences of the United States of America, 87(8), 3174-3176 (1990-04-01)
To probe for free radical intermediates in the model methylmalonate to succinate rearrangements promoted by vitamin B12s, a model series with a pentenyl side chain radical trap has been devised. The control free radical, generated by tri-n-butyltin hydride treatment of
Paul R Blakemore et al.
Organic letters, 7(21), 4721-4724 (2005-10-08)
[reaction: see text] The title alkaloid was synthesized in racemic form from 3,7-diallyl-2,4,6,8-tetraoxo-3,7-diazabicyclo[3.3.1]nonane (7) by a regioselective diallylation reaction followed by double ring-closing olefin metathesis and exhaustive reduction. Tetraoxobispidine 7 was itself prepared in three simple operations from dimethyl malonate.
Reiko Fujita et al.
Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 126(2), 99-108 (2006-02-08)
The reactions of 2- or 4-cyanopyridinium salts with active methylene compounds such as dimethyl malonate, malononitrile, and cyclohexane-1,3-dione affording 2- or 4-(substituted methylene) pyridines are described. Similar reactions of 4-cyano-2-methylthiopyridinium and 4-cyano-2-methylthioquinolinium salts, both of which have two leaving groups
Ingalill Andersson et al.
The clinical respiratory journal, 1(1), 23-29 (2007-07-01)
Eating problems are common in patients with chronic obstructive pulmonary disease (COPD), and intake of micronutrients might be lower than recommended. To study dietary intake, serum and urinary concentration of trace elements and vitamins in elderly underweight patients with established
F D Ledley et al.
Biochemical and biophysical research communications, 177(3), 1076-1081 (1991-06-28)
In most animal species and many prokaryotes, methylmalonyl CoA mutase catalyzes isomerization between methylmalonyl CoA and succinyl CoA using adenosylcobalamin as a cofactor. We describe the absence of this enzyme in Aspergillus nidulans based on the absence of enzyme activity
N I Fedotcheva et al.
Biokhimiia (Moscow, Russia), 56(3), 426-433 (1991-03-01)
Methylmalonate and propionate, the major metabolites of the propionate pathway of fatty and amino acid metabolism used at 1-4 mM cause selective inhibition of succinate and palmitoyl carnitine oxidation in liver mitochondria. Methylmalonate is more specific towards succinate, whereas propionate--towards
M Coker et al.
Journal of inherited metabolic disease, 19(6), 743-751 (1996-01-01)
Total plasma odd-numbered long-chain fatty acids were analysed in patients with methylmalonic acidaemia (vitamin B12-responsive and unresponsive), combined methylmalonic acidaemia/homocystinuria (CblC), propionic acidaemia (both neonatal-onset and late-onset), biotinidase deficiency and holocarboxylase synthase deficiency, as well as in hospital controls. Total
K Hiroi et al.
Chemical & pharmaceutical bulletin, 48(3), 405-409 (2000-03-22)
The Lewis acid-mediated reactions of allene-ene compounds, derived from 3-methylcitronellal or dimethyl malonate, were carried out using various Lewis acids such as ethylaluminum dichloride, diethylaluminum chloride, titanium chloride, zinc chloride etherate, or boron trifluoride etherate, affording unexpectedly intramolecular [2+2]cycloaddition products
Lawrence P Tardibono et al.
Organic letters, 11(18), 4076-4079 (2009-08-22)
Homoallylic esters are obtained in a single transformation from allyl 2,2,2-trifluoroethyl malonates by using a Pd(0) catalyst. Facile decarboxylation of allyl 2,2,2-trifluoroethyl malonates is attributed to a decrease in pK(a) compared to allyl methyl malonates. Subsequent reduction of the homoallylic
Luiz Fernando Freire Royes et al.
Pharmacology, biochemistry, and behavior, 83(1), 136-144 (2006-02-14)
Methylmalonic acidemias are metabolic disorders caused by a severe deficiency of methylmalonyl CoA mutase activity, which are characterized by neurological dysfunction, including convulsions. It has been reported that methylmalonic acid (MMA) accumulation inhibits succinate dehydrogenase (SDH) and beta-hydroxybutyrate dehydrogenase activity
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