Definition
ChEBI: Thiamine(1+) diphosphate(1-) is an ammonium betaine that is the conjugate base of thiamine(1+) diphosphate arising from the deprotonation of one of the hydroxy groups of the terminal phosphate group. It has a role as a Saccharomyces cerevisiae metabolite and a human metabolite. It is a vitamin B1, an ammonium betaine and a thiamine phosphate. It is a conjugate base of a thiamine(1+) diphosphate. It is a conjugate acid of a thiamine(1+) diphosphate(3-).
Purification Methods
Cocarboxylase tetrahydrate recrystallises from aqueous Me2CO. [Wenz et al. Justus Liebigs Ann Chem 618 210 1958, UV: Melnick J Biol Chem 131 615 1939, X-ray: Carlisle & Cook Acta Cryst (B) 25 1359 1969.] The hydrochloride salt has m 242-244o(dec), 241-243o(dec) or 239-240o(dec) and crystallises from aqueous HCl/EtOH, EtOH containing HCl or HCl/Me2CO. [Weijlard J Am Chem Soc 63 1160 1941, Synthesis: Weijlard & Tauber J Am Chem Soc 60 2263 1938, Beilstein 27 III/IV 1777.]
