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Chelate complex of the Chen-Kao reaction starting from (1S,2S)-pseudoephedrine. The Chen-Kao reaction (named after Ko Kuei Chen and Chung-Hsi Kao, Madison, Wisconsin 1926) [1] [2] is a chemical method for determining the presence of pseudoephedrine, ephedrine, and similar phenylalkylamines. [3]
In stereochemistry, a chiral auxiliary is a stereogenic group or unit that is temporarily incorporated into an organic compound in order to control the stereochemical outcome of the synthesis. [1] [2] The chirality present in the auxiliary can bias the stereoselectivity of one or more subsequent reactions. The auxiliary can then be typically ...
Pseudoephedrine, sold under the brand name Sudafed among others, is a sympathomimetic medication which is used as a decongestant to treat nasal congestion. [1] [13] [2] It has also been used off-label for certain other indications, like treatment of low blood pressure.
Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... It is a derivative of pseudoephedrine and an isomer of N-methylephedrine.
Ephedra was used 5000 years ago in China as a medicinal plant; its active ingredients are alkaloids ephedrine, pseudoephedrine, norephedrine (phenylpropanolamine) and norpseudoephedrine . Natives of Yemen and Ethiopia have a long tradition of chewing khat leaves to achieve a stimulating effect. The active substances of khat are cathinone and ...
Although the criminal allegations arose from Unimed's importation of four shipments of alleged precursors of pseudoephedrine and ephedrine during 2005–06, Unimed had still had on-hand, in March 2006, an unsold balance of 9.806 metric tons of finished pseudoephedrine products, which had been legally imported in 2004, but which were still ...
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Pseudoephedrine, ephedrine, phenylacetone, and phenylacetic acid are currently DEA list I, and acetic anhydride is list II on the DEA list of chemicals subject to regulation and control measures. This method can involve the use of mercuric chloride and leaves behind mercury and lead environmental wastes. [ 101 ]