FIELD: organic chemistry, vitamins. SUBSTANCE: product: phosphothiamine, yield is 42% Reagent 1: thiamine mononitrate. Reagent 2: P2O5,, H3PO4. Reaction conditions: in the presence of RCONH2 where R H, NH2,, C4H24+1, at n 1-4, at increased temperature. EFFECT: improved method of synthesis.
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