List of intermediates used in the synthesis of Rabeprazole, Lansoprazole, and Pantoprazole:
*Rabeprazole Intermediates:*
1. 2-[[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole (CAS: 117976-89-5)
2. 4-(3-Methoxypropoxy)-3-methyl-2-pyridinecarboxaldehyde (CAS: 117976-86-2)
3. 2-[[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]thio]-1H-benzimidazole (CAS: 117976-88-4)
*Lansoprazole Intermediates:*
1. 2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole (CAS: 103577-45-3)
2. 3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinecarboxaldehyde (CAS: 103577-42-0)
3. 2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]thio]-1H-benzimidazole (CAS: 103577-44-2)
*Pantoprazole Intermediates:*
1. 5-[(Difluoromethoxy)-2-pyridinyl]methylsulfinyl-1H-benzimidazole (CAS: 123246-64-9)
2. 2-Pyridinemethanol, 5-[(difluoromethoxy)-2-pyridinyl]methyl ether (CAS: 123246-62-7)
3. 5-[(Difluoromethoxy)-2-pyridinyl]methylthio-1H-benzimidazole (CAS: 123246-63-8)
Please note that these intermediates may have specific handling and storage requirements, and you should ensure compliance with local regulations and safety standards when handling these chemicals. Additionally, the synthesis of these intermediates may involve complex chemical reactions, and you should consult with experienced chemists or chemical engineers to ensure proper execution.