Synthetic Studies on Formamidopyrimidines Related to Clofarabine
作者:William R. Cantrell、Dennis Lovett、Tracy Engles、Bruce Anderson、William E. Bauta、Paul C. Wolstenholme-Hogg
DOI:10.1080/15257770802257770
日期:2008.8.11
Degradation of clofarabine (3) in 0.9% saline solution at 100C afforded three degradation products which were determined to be formamidopyrimidines 4-6.Compounds 4 and 5 were assigned as C(1)' anomers on the basis of one-dimensional and two-dimensional NMR experiments, whereas 6 was found to be the formamidopyrimidine lacking the sugar moiety. An improved procedure for the synthesis of formamidopyrimidines was developed, wherein benzoylated clofarabine (11) was treated with allyl chloroformate, followed by deprotection of the alloc group with catalytic Pd(PPh(3))(4) and dimedone. A synthesis of compound 6 from 4 is also described.
The Preparation and Properties of Certain 2- and 4-Chloro Substituted Pteridines<sup>1</sup>
作者:John W. Daly、Bert E. Christensen
DOI:10.1021/ja01582a062
日期:1956.1
Über einige Derivate des Triazolo-pyrimidins
作者:P. Bitterli、H. Erlenmeyer
DOI:10.1002/hlca.19510340311
日期:——
Ausgehend von den entsprechenden 2,6-substituierten 4,5-Diamino-pyrimidinen wurden fünf mit Guanin isostere Derivatedes Triazolo-pyrimidins dargestellt.