p-Chlorophenacyl bromide → 5-(4-Chlorophenyl)-3,6-dihydro-1,3,4-thiadiazin-2-one

Beteiligte Stoffe

Reaktionsschritte

A mixture of 2-bromo-1-(4-chloro-phenyl)-ethanone (90.71 mmoles) and hydrazine-carbothioic acid O-ethyl ester (90.71 mmoles) in acetonitrile (84 ml) is stirred at ambient temperature for 3 hours. The solid formed is filtered off, washed with acetonitrile and ethyl ether and then dried in vacuo to yield the title product, which is used directly in the next Step.

Herkunft & Nachweise