盐酸 、 噻吗洛尔 以
异丙醇 为溶剂,
反应 0.5h,
以1.47 g of pure product was obtained (yield 91%)的产率得到(S)-1-[(1,1-dimethylethyl)amino]-3-{[4-(4-morpholinyl)-1,2,5-thiadiazol-3-yl]oxy}-2-propanol hydrochloride
Chitosan-thio-amidine conjugates and their cosmetic as well as pharmaceutic use
申请人:Mucobiomer Biotechnologische Forschungs- und Entwicklungs GESmbH
公开号:US07053068B2
公开(公告)日:2006-05-30
By the reaction of chitosan with iminothiolactones such as 2-iminothiolane, thiol groups can be covalently immobilized on the polymer. The resulting chitosan derivatives exhibit thiol groups which are capable of forming inter- and intramolecular disulfide bonds. Because of this crosslinking process the viscosity of polymer solutions is strongly improved. Moreover, the cationic character of the polymer is strongly improved. Preferred applications of these novel chitosan derivatives are their cosmetic and pharmaceutical use
A diffusional drug delivery device is described which can provide for stability of the adhesive and system components, elimination of the initial burst of drug and hence irritation, and to provide for delayed onset of therapeutic effect along with delivery of a therapeutic agent at an optimum rate. The therapeutic agent in a first form which is suitable for storage, and the anhydrous activating means are inert when in an anhydrous environment. Moisture activates the system whereby the activating means provides an acidic or basic solution and the first form of the therapeutic agent is converted to a second form which is suitable for absorption through the skin or mucosa.