NOVELTY - A tenatoprazole intermediate is synthesized by producing 2-amino-3-nitryl-6-chloropyridine via 2, 6-dichloro-3-nitrylpyridine; producing 2-amino-3-nitro-6-methoxypyridine via 2-amino-3-nitryl-6-chloropyridine; producing 2,3-diamino-6-methoxypyridine via 2-amino-3-nitro-6-methoxypyridine; and producing 2-Mercapto-5-methoxyimidazole-(4,5-b)pyridine (MIPT) via 2,3-diamino-6-methoxypyridine.    USE - Process for synthesizing a tenatoprazole intermediate (claimed).    ADVANTAGE - The process shortens reaction volume, accelerates reaction time, and improves reaction rate, where the solvent can be recycled. It also saves cost, is environment friendly, reduces reaction hazard, makes the commercial process possible, simplifies reaction process, saves reaction cost, and avoids using high pressure reaction and expensive palladium-carbon catalyst.    DETAILED DESCRIPTION - Synthesis of a tenatoprazole intermediate involves putting 2,6-dichloro-3-nitrylpyridine into ethanol, and adding ammonia to obtain 2-amino-3-nitryl-6-chloropyridine. Re-crystallization is processed via absolute ethanol to obtain more than 99% product. Absolute ethanol is added into a container, followed by sodium hydroxide, and reacted to release heat. Cooling is conducted by stirring. The product is added, stirred, refluxed, and cooled. Yellow solid is precipitated, then filtered. Water is used in washing until neutral. Re-crystallization is processed via acetone to obtain more than 99% product. A 2,3-diamino-6-methoxypyridine is produced via 2-amino-3-nitro-6-methoxypyridine. MIPT is produced via 2,3-diamino-6-methoxypyridine. The product is mixed with sodium sulfide, water, and polyethylene glycol catalyst. The mixture is refluxed, stirred, and cooled. Carbon disulfide is added, stirred, and reacted for 1-2 hours at cooling temperature. Acidizing is conducted via ethylic acid until neutral. Solid is precipitated. Filtering is conducted. Water is used in washing. Drying is conducted. Re-crystallization is processed via 95% ethanol. Decoloring is conducted via activated carbon. Cooling is performed to precipitate solid, followed by filtering. The filtrate is filtered again after a time. The solids are combined to obtain the final product. The sodium sulfide is 600-800 g. Water is 500-800 ml. The polyethylene glycol catalyst is 15-25 ml. Refluxing and stirring are conducted for 2-3 hours. Cooling temperature is 30-35 degrees C. Carbon dioxide is used at 70-100 ml.