3-[(3-甲氧基-2-吡啶基)氧基]-1,2-丙烷二醇 在
三氟乙酸 作用下,
以
原乙酸三乙酯 为溶剂,
反应 3.0h,
以crude 2-ethoxy-5-(3-methoxy-2-pyridyloxymethyl)-2-methyl-1,3-dioxolane is obtained in the form of an oil, which的产率得到2-[(2-Ethoxy-2-methyl-1,3-dioxolan-4-yl)methoxy]-3-methoxypyridine
The invention relates to novel piperidino-propanols, especially 1-(3-heterocyclyloxy-2-hydroxy-propanol)-4-(N-diazcyclyl)-piperidines of the formula ##STR1## in which R.sub.1 is a substituted or unsubstituted heteroaryl radical, R.sub.2 is hydrogen or a substituted or unsubstituted aliphatic, cycloaliphatic, cycloaliphatic-aliphatic or araliphatic hydrocarbon radical or an acyl radical and alk is lower alkylene which separates the two nitrogen atoms from one another by 2 or 3 carbon atoms, or is a substituted or unsubstituted 1,2-phenylene radical, and salts thereof, as well as processes for their preparation, and also to pharmaceutical preparations containing these compounds and the use thereof, preferably in the form of pharmaceutical preparations as antihypertensive agents, antitachycardiac agents and .alpha.-sympathicolytic agents.