NH3, rt, 12 h (58.17% overall 2 steps); (v) Benzoyl chloride, pyridine, rt, 3 h (87.6% of 6 and 83% of 9; (vi) NaH (60%), CH3I, THF, −78 °C, 4.5 h to −30 °C, 1 h (75%). Scheme 1. Synthetic scheme of the protected DMANA congeners for uracil, cytosine ...