Yield:21017-05-0 69%

Reaction Conditions:

Stage #1: Inosinewith pyridine;thionyl chloride in acetonitrile at 0 - 20; for 19 h;
Stage #2: with ammonium hydroxide in methanol;water at 20; for 0.5 h;

References:

McKean, Iain J. W.;Sadler, Joanna C.;Cuetos, Anibal;Frese, Amina;Humphreys, Luke D.;Grogan, Gideon;Hoskisson, Paul A.;Burley, Glenn A. [Angewandte Chemie - International Edition,2019,vol. 58,# 49,p. 17583 - 17588][Angew. Chem.,2019,vol. 131,# 49,p. 17747 - 17752,6] Location in patent:supporting information