62160-25-2Relevant articles and documents
Denitrified purine compound and pharmaceutical composition, preparation method and application thereof
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Paragraph 0057; 0062; 0063; 0064; 0065, (2018/04/03)
The invention relates to denitrified purine compound which has a structure as a following general formula 1, a preparation method of the denitrified purine compound, a pharmaceutical composition containing the denitrified compound and application of the denitrified compound. The compound has selective B-Raf V600E mutation cancer cell inhibition activity, so that the denitrified purine compound disclosed by the invention and the pharmaceutical composition of the denitrified purine compound can be applied to preparing medicine for treating tumor or cancer.
Synthesis of Queuine, the Base of Naturally Occuring Hypermodified Nucleoside (Queuosine), and Its Analogues
Akimoto, Hiroshi,Imamiya, Eiko,Hitaka, Takenori,Nomura, Hiroaki,Nishimura, Susumu
, p. 1637 - 1644 (2007/10/02)
A convenient new method for synthesizing queuine (1) pyrrolopyrimidin-4(3H)-one>, the base of the naturally occuring hypermodified nucleoside, queuosine, present in certain transfer RNAs, and its biosynthetic precursor, 2-amino-5-aminomethylpyrrolopyrimidin-4(3H)-one (2) (Pre Q1 base), was succesfully exploited.This method involved two critical rections: the Mannich reaction using dibenzylamine-formaldehyde of 2-acrylaminopyrrolopyrimidin-4(3H)-one (7), which resulted in the selective introduction of the dibenzylaminomethyl group into the 5-position of (7), and an amine exchange reaction of the 5-dibenzylamino function in the resulting Mannich base (17) with (1S,2R,3S)-2,3-isopropylidenedioxycyclopent-4-enylamine, which yielded the desired queuine (1).Similar reaction of (17) with ammonia gave the biosynthetic precursor of queuine (2) (Pre Q1 base).Thus, a series of queuine analogues with structural variations in their 5-aminomethyl side-chains was synthesized by the amine exchange reaction of (17) with appropriate amines or by acylation of (2) with appropriate acylating agents.