Imidazolidinones as sympathicolytics

摘要

Imidazolidinones of formula where R is alkyl are prepared by reacting 4-(1-piper-azinyl) 4,5-dihydrothieno 2.3-b 1 benzothiapine with a compound of formula in which Y is halogen. Cpd. 1- left brace 2- 4-(4-5-dihydrothieno 2.3-b 1 benzothiapine-4-yl) 1-pipazinyl ethyl right brace 3-methyl 2-imidazolidinone in particular is active as anti-histamines and as tranquillisers.