Water → 2-Chloro-7-iodo-5-methyl-5H-pyrrolo[3,2-d]pyrimidine

To a suspension of 2-chloro-7-iodo-5H-pyrrolo[3,2-d]pyrimidine (1 g, 3.57 mmol, 1.0 eq.) and NaOH (0.430 mg, 10.73 mmol, 3.0 eq.) in DCM (28 ml) was added iodomethane (0.66 g, 4.6 mmol, 1.3 eq.) and tetrabutylammonium bromide (0.116 g, 0.36 mmol, 0.1 eq.). The reaction mixture was stirred at room temperature overnight. Water was poured in and the aqueous layer extracted with ethyl acetate (2 times). The combined organic layers were then dried over Na2SO4. After filtration and evaporation the yellow residue was triturated with a mixture of ethyl acetate/petroleum spirit (1:2) to give the product as a white solid (0.73 g, 70%). 1H NMR (DMSO, 300 MHz): 8.99 (s, 1H), 8.17 (s, 1H), 3.94 (s, 3H); LRMS (EI): m/z calcd for [M+H]+ 293.93 found 294.1.

1. extractionextracted with ethyl acetate (2 times)
2. dry with materialThe combined organic layers were then dried over Na2SO4
3. filtrationAfter filtration and evaporation the yellow residue
4. customwas triturated with a mixture of ethyl acetate/petroleum spirit (1:2)

ORD record

ord-fc303d67a18e4c138c5dc6e74896d146

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08354408B2