1-(2-bromoethyl)cyclopropan-1-ol

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 7-(4-chlorobenzyl)-3-methyl-8-(propylthio)-1H-purine-2,6(3H,7H)-dione (124 mg, 0.34 mmol) in DMF (7 mL) was added 1-(2-bromoethyl)cyclopropanol (67.3 mg, 0.41 mmol, intermediate 46), followed by potassium carbonate (141 mg, 1.02 mmol). The reaction was stirred at 70° C. for 5 h. The reaction was cooled and partitioned between ethyl acetate and water. The organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated to give a crude yellow oil product (100 mg, 66.9% yield). LCMS MH+ 449. The reaction was cooled partitioned between ethyl acetate and water The organic phase was washed with brine dried over sodium sulfate filtered concentrated

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 8-bromo-7-(4-chlorobenzyl)-3-methyl-1H-purine-2,6(3H,7H)-dione (150 mg, 0.405 mmol, intermediate 8) in DMF (5 mL) was added 1-(2-bromoethyl)cyclopropanol (94 mg, 0.568 mmol) followed by potassium carbonate (84 mg, 0.609 mmol) and TBAI (catalytic amount). The resulting mixture was stirred at 50° C. overnight. The reaction was diluted with ethyl acetated and washed with brine. The organic phase was dried and concentrated to give crude product which was purified via silica gel chromatography eluting with petroleum ether/ethyl acetate (5:1 to 2:1) to give 8-bromo-7-(4-chlorobenzyl)-1-(2-(1-hydroxycyclopropyl)ethyl)-3-methyl-1H-purine-2,6(3H,7H)-dione (150 mg, 81.6% yield) as light yellow solid. LCMS retention time 1.523 min; LCMS MH+ 455. The reaction was diluted with ethyl washed with brine The organic phase was dried concentrated to give crude product which was purified via silica gel chromatography eluting with petroleum ether/ethyl acetate (5:1 to 2:1)