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tert-Butyloxycarbonyl protecting group. The tert-butyloxycarbonyl protecting group or tert-butoxycarbonyl protecting group [1] (BOC group) is an acid-labile protecting group used in organic synthesis. The BOC group can be added to amines under aqueous conditions using di-tert-butyl dicarbonate in the presence of a base such as sodium hydroxide:
Di-tert-butyl dicarbonate is a reagent widely used in organic synthesis. [1] Since this compound can be regarded formally as the acid anhydride derived from a tert-butoxycarbonyl (Boc) group, it is commonly referred to as Boc anhydride. This pyrocarbonate reacts with amines to give N-tert-butoxycarbonyl or so-called Boc
Topical decongestants are decongestants applied directly to the nasal cavity. Their effectiveness by themselves in the common cold appears to have a small benefit in adults. [1] Topical decongestants should only be used by patients for a maximum of 5–7 days in a row, because rebound congestion may occur in the form of rhinitis medicamentosa ...
The tert-butyloxycarbonyl group is marked blue. Amines have a special importance in peptide synthesis, but are a quite potent nucleophile and also relatively strong bases. These characteristics imply that new protecting groups for amines are always under development. [47] Amine groups are primarily protected through acylation, typically as a ...
A decongestant, or nasal decongestant, is a type of pharmaceutical drug that is used to relieve nasal congestion in the upper respiratory tract. The active ingredient in most decongestants is either pseudoephedrine or phenylephrine (the latter of which has disputed effectiveness ).
A medical professional applies nose drops. Nasal administration, popularly known as snorting, is a route of administration in which drugs are insufflated through the nose.It can be a form of either topical administration or systemic administration, as the drugs thus locally delivered can go on to have either purely local or systemic effects.
Gelators serve as stabilizers and thickeners, thickening the gel solution while simultaneously maintaining the gel’s flexible nature. [8] When dispersed through the solvent as a colloid, gelators offer a stable internal structure to the gel. [8] Gelators are usually chosen based on their affinity for the solvent and the purpose of the gel. [5]
Flunisolide nasal spray is absorbed into the circulatory system (blood). [3] Corticosteroid nasal sprays may affect the hypothalamic-pituitary-adrenal axis function in humans. [7] After obtaining the desired clinical effect, the maintenance dose should be reduced to the smallest amount required to control the symptoms. The amount can be as low ...