52671-43-9Relevant articles and documents
A process for the preparation of intermediates the advantage cuts down Sha Ban
-
Paragraph 0055; 0056; 0057; 0058, (2016/10/10)
The invention discloses a synthetic method of rivaroxabanintermediate4-(4-nitrosobenzene)-3-morpholine. The method comprises steps as follows: (1), halogenated benzene (I) and ethanolamine react under the condition of a catalyst and alkali to generate N-ethoxylaniline (II), N-ethoxylaniline (II) and nitrous acid or nitrite react to generate 4-nitroso-N-ethoxylaniline (III), and 4-nitroso-N-ethoxylaniline (III) and chloroacetyl chloride react to generate 4-(4-nitrosobenzene)-3-morpholine (IV). According to the synthetic method of 4-(4-nitrosobenzene)-3-morpholine, required raw materials and reagents are cheap and are easy to obtain, the yield is high, and the cost is low; the reaction condition is mild; fewer three wastes are produced; and the product quality is reliable and stable, and the whole process is very suitable for industrial production.