The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis and Plant Growth Stimulating Action of 2-Amino-6-methylpyrimidine-4(3H)-thione Derivatives》. Authors are Hambardzumyan, E. N.; Vorskanyan, A. S.; Shahbazyan, L. V.; Yengoyan, A. P..The article about the compound:2-Amino-6-methylpyrimidine-4-thiolcas:6307-44-4,SMILESS:SC1=CC(C)=NC(N)=N1).HPLC of Formula: 6307-44-4. Through the article, more information about this compound (cas:6307-44-4) is conveyed.
A series of new pyrimidine derivatives, e.g., I including those containing an azole or azine heterocycle linked through a sulfur atom or a thiomethylene group, was synthesized based on 2-amino-6-methylpyrimidine-4(3H)-thione. The synthesized compounds exhibited a pronounced stimulating effect on plants growth in the range of 43-96% compared to heteroauxin.
There is still a lot of research devoted to this compound(SMILES：SC1=CC(C)=NC(N)=N1)HPLC of Formula: 6307-44-4, and with the development of science, more effects of this compound(6307-44-4) can be discovered.
Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com