21817-85-6

Upstream product

• 6610-29-3 4-methylthiosemicarbazide 
• 70-11-1 α-bromoacetophenone 
• 21812-00-0 3-methyl-2-methylsulfanyl-4-phenyl-thiazolium; iodide 

Downstream Products

• 23097-31-6 2-(4-dimethylamino-naphthalen-1-ylazo)-3-methyl-4-phenyl-thiazolium; iodide 
• 31787-12-9 1,3-bis-(3-methyl-4-phenyl-thiazol-2-yl)-1,2-diaza-trimethinium; iodide 
• 31787-07-2 3-methyl-2-{[(3-methyl-4-phenyl-3H-thiazol-2-ylidene)-hydrazono]-methyl}-benzothiazolium; iodide 
• 31787-08-3 3-methyl-2-{[(3-methyl-4-phenyl-3H-thiazol-2-ylidene)-hydrazono]-methyl}-naphtho[2,1-d]thiazolium; iodide 
• 31787-11-8 1-methyl-2-{[(3-methyl-4-phenyl-3H-thiazol-2-ylidene)-hydrazono]-methyl}-naphtho[1,2-d]thiazolium; iodide 
• 21817-99-2 4-Phenyl-2-(4-diethylamino-phenylazo)-3-methyl-thiazolium 

Relevant academic research and scientific papers

Unexpected ring enlargement of 2-hydrazono-2,3-dihydro-1,3-thiazoles to 1,3,4-thiadiazines

The cyclization of thiosemicarbazide with α-bromoacetophenone can result in the formation of isomeric 1,3,4-thiadiazines and two different thiazoles. We studied the use of 4-methyl- and 4-ethylthiosemicarbazide as dinucleophilic building blocks. In this c