Abstract
PTEROIC and pteroylglutamic acids were first synthesized from 2 : 4 : 5-triamino-6-hydroxypyrim-idine (I), 1 : 2-dibromopropionaldehyde and p-amino-benzoic or p-aminobenzoylglutamic acids1. The action of an α-halogenocarbonyl compound on a 4 : 5-diaminopyrimidine introduces a new variation of the general method of pteridine synthesis remarkable for the spontaneous oxidation of the dihydro-pteridine initially obtained during the course of the reaction. It has been observed, however, that the formation of an intermediate dihydro derivative can sometimes be troublesome in that the hydrogen eliminated may effect the reduction of substituents2. The use of 1 : 1-dihalogeno-aldehyde or -ketone would, if successful, avoid this difficulty; but apart from Purrmann's somewhat analogous synthesis of xanthopterin from dichloracetic acid and the pyrimidine (I)3, it is a modification not hitherto investigated.
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References
Waller et al., J. Amer. Chem. Soc., 70, 19 (1948).
Angier et al., J. Amer. Chem. Soc., 70, 3029 (1948).
Purrmann, Annalen, 546, 98 (1940).
Angier et al., Science, 103, 667 (1946).
Forrest and Walker, J. Chem. Soc., 79 (1949).
Cloez, Ann. Chim. Phys., (6), 9, 176 1886)
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KING, F., SPENSLEY, P. Application of Halogeno-Ketones to the Synthesis of Pteridines, Including Pteroic Acid. Nature 164, 574–575 (1949). https://doi.org/10.1038/164574a0
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DOI: https://doi.org/10.1038/164574a0
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