133973-87-2

Upstream product

• 3182-95-4 L-Phenylalaninol 
• 99971-84-3 4,6-dichloro-1-phenyl-1H-pyrazolo<3,4-d>pyrimidine 
• 132537-82-7 (S)-β-<(1-phenyl-6-chloro-1H-pyrazolo<3,4-d>pyrimidin-4-yl)amino>benzenepropanol 

Downstream Products

• 133973-80-5 (S)-2,7-dihydro-7-phenyl-2-(phenylmethyl)-5-propoxy-3H-imidazo[1,2-c]pyrazolo[4,3-e]pyrimidine 

Relevant academic research and scientific papers

Conformationally restrained, chiral (phenylisopropyl)amino-substituted pyrazolo[3,4-d]pyrimidines and purines with selectivity for adenosine A1 and A2 receptors

Two modes of tethering a chiral (phenylisopropyl)amino substituent in pyrazolo[3,4-d]pyrimidines and purines have been explored. One mode gave (S)- 2,7-dihydro-7-phenyl-2-(phenylmethyl)-5-propoxy-3H-imidazo[1,2-c]pyrazolo- [4,3-e]pyrimidine (12a) and its corresponding R-enantiomer 12b, which were selective for A2 and A1 adenosine receptors, respectively. The corresponding diimidazo[1,2-c:4',5'-e]pyrimidines 12e and 12f were analogously selective. This is the first example where a single chiral recognition unit provides enantiomers with opposite selectivities for adenosine receptors. The second mode gave (2S-trans)-2,7-dihydro-2-methyl- 3,7-diphenyl-5-propoxy-3H-imidazo[1,2-c]-pyrazolo[4,3-e]pyrimidine (12c) and its corresponding R-enantiomer 12d. Compounds 12c and 12d were significantly less potent than 12a and 12b at A1 receptors, and were nonselective.

Selective adenosine reseptor compounds

Adenosine analogues which act selectively at adenosine receptors and which act in general as adenosine antagonists are disclosed. From in vitro studies it is known that specific physiological effects can be distinguished as a result of this selectivity an