Pyridazine, also known as o-diazobenzene, is a six-membered heterocyclic compound containing two nitrogen heteroatoms in the 1 and 2 positions with a special structure and a wide biological activity. Pyridazine is more and more popular in drug development, and a variety of pyridazine drugs have been developed and marketed. From the perspective of the therapeutic field, pyridazine drug molecules are mainly used for tumor treatment, but also involve in many therapeutic fields such as inflammation, hypertension and cardiovascular disease. With the increase and in-depth of research, pyridazine drugs will play more roles in the treatment of diseases.
Thiomorpholine is a nitrogen- and sulfur-containing heterocyclic compound with the molecular formula C4H9NS. It can be considered a thio analog of morpholine. Thiomorpholines are comparable to other secondary amines in terms of nucleophilicity and N-alkylation or acylation with alkyl groups or acid halides.
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