1-Propanol → HCID 15409399, compound

Participants

Reaction Conditions

Reaction Steps

54.0 g (0.155 mol) of N4-benzoyl-1-(β-D-ribopyranosyl)cytosine 1 were dissolved in 830 ml of dimethylformamide (DMF) and 1.5 l of pyridine (both solvents dried and stored over molecular sieve 3 Å) with warming to 124° C. 23.0 g (0.163 mol; 1.05 eq.) of BzCl, dissolved in 210 ml of pyridine, were added dropwise at −58° to −63° C. in the course of 3.5 h. The batch was stirred overnight in a cooling bath. 90.3 g (1.5 mol; 10 eq.) of n-propanol were stirred in and the batch was concentrated at 40° C. in a high vacuum. Pyridine residues were removed by twice adding 150 ml of toluene and concentrating again. 124.3 g of residue were dissolved in 500 ml of CH2Cl2, extracted twice by stirring with 300 ml of half-concentrated NaHCO3 solution each time, and the precipitated solid was filtered off and dried: 60.7 g of residue. The CH2Cl2 phase was concentrated: 25.0 g. Separate chromatography on silica gel 60 (40×10 cm) with gradients (AcOEt/isohexane, 4:1, then pure AcOEt, then AcOET/MeOH, 19:1 to 2:1) yielded (TLC (silica gel, AcOET)):

Provenance & Evidence