40139-59-1

Basic information

• Product Name: 3-Methyl-6H-benzothieno<3,2-d>-1,3-oxazin-6-one

Upstream product

• 2634-33-5 1,2-benzisothiazol-3-one 
• 108-24-7 acetic anhydride 

Downstream Products

• 40139-63-7 2-methyl-3-phenyl-3H-benzo[4,5]thieno[3,2-d]pyrimidin-4-one 

Relevant articles and documents

Ring Transformation of 3-Hydroxy-1,2,5- and -1,2,4-thiadiazoles and -isothiazoles into Isothiazole , Thiazole and Thiophene Derivatives

Ring transformation of 3-hydroxy-1,2,5-thiadiazole (1), 3-hydroxy-1,2,4-thiadiazole (14), and 3-hydroxyisothiazole (18) by the reaction with acetic anhydride in the presence of DBU afforded isothiazoles 2-5 and 13, thiazoles 15 and 16 and thiophenes 21-25, respectively.The reaction of 1 with propionic anhydride gave isothiazole 13.The formation pathway of the products is mentioned.