Trityl chloride → 3-iodo-1-trityl-1H-pyrazolo[3,4-d]pyrimidin-4-amine

A suspension of 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (3.0 g, 11.5 mmol) in dimethylformamide (50 mL) was treated with cesium carbonate (5.62 g, 17.25 mmol) and triphenylmethyl chloride (3.85 g, 13.8 mmol). The reaction mixture was stirred at 70° C. for 22.5 h under a nitrogen atmosphere. Cesium carbonate (3.75 g, 11.5 mmol) and triphenylmethyl chloride (3.2 g, 11.5 mmol) were added to the reaction mixture and was stirred for 6.5 h. The reaction mixture was added to ice water. The precipitate was filtered and washed with water. The product, 3-iodo-1-trityl-1H-pyrazolo[3,4-d]pyrimidin-4-amine, was dried over night on the lyophilizer. The resulting solid was triturated with ethyl acetate to give 3.05 g (53%) of 3-iodo-1-trityl-1H-pyrazolo[3,4-d]pyrimidin-4-amine. 1H NMR (DMSO-d6, 400 MHz) δ 7.3190-7.1106 (m, 16H); TLC (Baker Pre-coated Hard Layer Silica Gel TLC plates, Si250F254, 30% Ethyl acetate in heptane) Rf=0.33.

1. stirringwas stirred for 6.5 h
2. filtrationThe precipitate was filtered
3. washwashed with water
4. dry with materialThe product, 3-iodo-1-trityl-1H-pyrazolo[3,4-d]pyrimidin-4-amine, was dried over night on the lyophilizer
5. customThe resulting solid was triturated with ethyl acetate

ORD-Eintrag

ord-d142046ea4504ca3b4a233a2f7c495dd

Quelldatensatz

uspto-grants-2005_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06921763B2