منابع مشابه
Thiamine hydrochloride (vitamin B1) as an efficient catalyst for the synthesis of 4-(3H)-Quinazolinone derivatives using grinding method.
Herein we explore facile synthesis of 4-(3H)-Qunazolinone derivatives, achieved by the cyclocondensation of anthranilic acid, aromatic amines and triethyl orthoformate in presence of thiamine hydrochloride (Vitamin B1) as a catalyst, using grinding method. This protocol offers several advantages such as reusability of catalyst, excellent yield, shorter reaction time and economic availability.Qu...
متن کاملVitamin B1
Vitamin B1 is a watersoluble vitamin. It consists out of a pyrimidineand a thiazol ring, which are synthesized independently and linked afterwards.Vitamin B1 is de novo produced by many plants and microorganisms. Humans and animals have to take it up by nutrition. They are only able to do the phosphorylation reaction of the thiamin molecule. Thiamin is found free and as mono-, diand triphosphat...
متن کاملThiamine (vitamin B1) status of boarding school students in the Southern Region of Papua New Guinea.
Thiamine pyrophosphate (TPP) is the major biologically active form of thiamine (vitamin B1). This cross-sectional study assessed whole-blood thiamine pyrophosphate concentration (WBTPPC) in boarding school students in the Southern Region of Papua New Guinea. Sample size for each of the five boarding schools was calculated using the 'proportionate to population size' cluster sampling technique. ...
متن کاملThiamine (vitamin B1) supplementation does not reduce fasting blood homocysteine concentration in most homozygotes for homocystinuria.
Homozygotes for homocystinuria due to cystathionine synthase (CS) deficiency accumulate homocysteine and methionine in their blood and tissues. High-dose pyridoxin, folic acid, vitamin B12, or betaine are therapeutical options to lower the elevated homocysteine concentration. These compounds stimulate the transsulfuration or remethylation of homocysteine. Despite such treatment, elevated blood ...
متن کاملCharacterization of Thi9, a novel thiamine (Vitamin B1) transporter from Schizosaccharomyces pombe.
Thiamine is an essential component of the human diet and thiamine diphosphate-dependent enzymes play an important role in carbohydrate metabolism in all living cells. Although the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe can derive thiamine from biosynthesis, both are also able to take up thiamine from external sources, leading to the down-regulation of the enzymes involved...
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ژورنال
عنوان ژورنال: Allergology International
سال: 2018
ISSN: 1323-8930
DOI: 10.1016/j.alit.2017.07.008