ドーパミン塩酸塩

化学的特性Dopamine hydrochloride is designated chemically as 3,4-dihydroxyphenethylamine hydrochloride, a white crystalline powder freely soluble in water. It can also be dissolved in hot 95% ethanol, methanol, and sodium hydroxide solution. However, it is insoluble in chloroform, ether, and benzene. It has no odor and a slightly bitter taste. Dopamine (also referred to as 3-hydroxytyramine) is a naturally occurring biochemical catecholamine precursor of norepinephrine.

用途生理、薬離作用研究用。

用途β1 受容体刺激によるアデニ ル酸シクラーゼ活性化作用を示します。

説明Dopamine (hydrochloride) is an endogenous catecholamine neurotransmitter synthesized from the amino acid L-tyrosine that acts as an agonist at dopamine receptors (D1-5). Dopamine is mainly synthesized in the substantia nigra and ventral tegmental area, and is a precursor in norepinephrine and epinephrine biosynthesis. Dopamine-containing neurons in the brain are involved in reward-motivated behavior, motor control, and hormone release. Dopamine is also synthesized in the adrenal glands where it exerts peripheral paracrine functions including control of vasodilation, sodium excretion, insulin production, gastrointestinal motility, and the activity of lymphocytes. Loss or damage of dopaminergic neurons in the substantia nigra is associated with Parkinson’s disease.

使用Endogenous catecholamine with α and β-adrenergic activity. Cardiotonic; antihypotensive.

一般的な説明Dopamine Hydrochloride is the hydrochloride salt form of dopamine, a monoamine compound with positive inotropic activity. Dopamine is a neurotransmitter which is a naturally occurring catecholamine. Dopamine hydrochloride salt is indicated as a medicine for the treatment of acute congestive and renal failures.

製造方法Dopamine hydrochloride is produced through the ring-opening reaction of piperonyl ethylamine. Piperethylamine and phenol are added to a reaction vessel and cooled down. Hydrochloric acid is slowly added while heating up the mixture to 110°C, and refluxed for 12-44 hours until the reaction reaches completion. The solution is then slightly cooled and water is added, and the mixture is stirred well and allowed to separate into layers. The upper phenolic layer is then removed, and the aqueous layer is extracted with isopropyl acetate. The extracted aqueous layer is then evaporated under reduced pressure (8.0kPa) until dry. Half the amount of ethanol and hydrochloric acid are added to the dry residue and heated to dissolve. The solution is then cooled, crystallized, and filtered. The filter cake is washed with ethanol and dried to obtain the final product, with a yield of 74%.