Main > VITAMINS > Thiamine. Vitamin B1. > Producers > Co.: DE. B > Patent > Claims Etc > Claim 1: 2-Me-4-Amino-5-AminoMe > Pyrimidine 1 ##STR8## Prepn. > Process: 2-Me-4-Amino-5-Alkoxy > MePyrimidine (2 ##STR9##)+ > Ammonia+Catalyst Reaction. Claim 2 > : Inert, Organic Solvent. Claim 3: > Ammonia is used as Solvent. Claim 4 > : Catalyst Lewis or Bronsted Acid > Claim 5: Lewis-Acid Oxide Element > Group IVA. Claim 6: Al2O3. Claim 7

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Group IVA. Claim 6: Al2O3. Claim 7's subsections
: Compd Form. 2 Alkoxy=Methoxy

Group IVA. Claim 6: Al2O3. Claim 7's products
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