Bromocyclopentane → 1-Cyclopentyl-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Participants

Reaction Steps

4-Amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidine (Compound 15) (0.91 g) in 50 mL dry dimethylacetamide was stirred under nitrogen at 25° C. while adding 60% sodium hydride (0.20 g). After stirring for 30 minutes bromocyclopentane (0.8 mL) was added and the mixture stirred overnight. After evaporation in vacuo the residue was treated with water and extracted into ethyl acetate. Flash chromatography (3:2 cyclohexane:ethyl acetate) eluted 0.36 g of 1-Cyclopentyl-4-(cyclopentylamino)-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidine as colourless oil. 1H n.m.r. (DMSO) 8.319(s, 1H), 7.65-7.69(m, 2H), 7.40-7.48(m, 2H), 7.09-7.23(m, 5H), 5.926/5.955(d, 1H), 5.17-5.29(quin, 1H), 4.44-4.52(m, 1H), 1.86-2.12(m, 8H), 1.39-1.72(m, 8H).

Provenance & Evidence