(4R)-4-methyl-1,3-dioxolan-2-one

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Adenine to PMPA using Magnesium t-Butoxide. To a suspension of adenine (40 g, 0.296 mol) in DMF (41.9 ml) was added (R)-propylene carbonate (34.5 g, 0.338 mol) and sodium hydroxide (0.480 g, 0.012 mol). The mixture was heated at 130° C. overnight. The reaction was cooled to 100° C. and toluene (138 ml) was added followed by methanesulfonic acid (4.7 g, 0.049 mol) while maintaining the reaction temperature between 100-110° C. Additional toluene (114 ml) was added to create a homogeneous solution. The solution was cooled to 3° C. over 7 hours and then held at 3° C. for one hour. The resulting solid was isolated by filtration and rinsed with acetone (2×). The wet solid was dried in vacuo at 80° C. to yield 42.6 g (75%) of (R)-9-[2-(hydroxy)propyl]adenine (HPA) as an off-white solid. Mp: 188-190° C. The reaction was cooled to 100° C. while maintaining the reaction temperature between 100-110° C The solution was cooled to 3° C. over 7 hours The resulting solid was isolated by filtration rinsed with acetone (2×) The wet solid was dried in vacuo at 80° C.

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Adenine to PMPA using Magnesium t-Butoxide. To a suspension of adenine (40 g, 0.296 mol) in DMF (41.9 ml) was added (R)-propylene carbonate (34.5 g, 0.338 mol) and sodium hydroxide (0.480 g, 0.012 mol). The mixture was heated at 130° C. overnight. The reaction was cooled to 100° C. and toluene (138 ml) was added followed by methanesulfonic acid (4.7 g, 0.049 mol) while maintaining the reaction temperature between 100-110° C. Additional toluene (114 ml) was added to create a homogeneous solution. The solution was cooled to 3° C. over 7 hours and then held at 3° C. for one hour. The resulting solid was isolated by filtration and rinsed with acetone (2×). The wet solid was dried in vacuo at 80° C. to yield 42.6 g (75%) of (R)-9-[2-(hydroxy)propyl]adenine (HPA) as an off-white solid. Mp: 188-190° C. The reaction was cooled to 100° C. while maintaining the reaction temperature between 100-110° C The solution was cooled to 3° C. over 7 hours The resulting solid was isolated by filtration rinsed with acetone (2×) The wet solid was dried in vacuo at 80° C.

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

Procedure: To a reaction vessel containing inert atmosphere, e.g., nitrogen, was added carbonate (A), adenine, N,N-dimethylformamide (DMF) and catalytic amount of base such as sodium hydroxide, then (R)-9-(2-hydroxypropyl)adenine (B) was obtained; To a reaction vessel containing inert atmosphere, e.g., nitrogen

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Adenine to PMPA using Magnesium t-Butoxide. To a suspension of adenine (40 g, 0.296 mol) in DMF (41.9 ml) was added (R)-propylene carbonate (34.5 g, 0.338 mol) and sodium hydroxide (0.480 g, 0.012 mol). The mixture was heated at 130° C. overnight. The reaction was cooled to 100° C. and toluene (138 ml) was added followed by methanesulfonic acid (4.7 g, 0.049 mol) while maintaining the reaction temperature between 100-110° C. Additional toluene (114 ml) was added to create a homogeneous solution. The solution was cooled to 3° C. over 7 hours and then held at 3° C. for one hour. The resulting solid was isolated by filtration and rinsed with acetone (2×). The wet solid was dried in vacuo at 80° C. to yield 42.6 g (75%) of (R)-9-[2-(hydroxy)propyl]adenine (HPA) as an off-white solid. Mp: 188-190° C. The reaction was cooled to 100° C. while maintaining the reaction temperature between 100-110° C The solution was cooled to 3° C. over 7 hours The resulting solid was isolated by filtration rinsed with acetone (2×) The wet solid was dried in vacuo at 80° C.

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Adenine to PMPA using Magnesium t-Butoxide. To a suspension of adenine (40 g, 0.296 mol) in DMF (41.9 ml) was added (R)-propylene carbonate (34.5 g, 0.338 mol) and sodium hydroxide (0.480 g, 0.012 mol). The mixture was heated at 130° C. overnight. The reaction was cooled to 100° C. and toluene (138 ml) was added followed by methanesulfonic acid (4.7 g, 0.049 mol) while maintaining the reaction temperature between 100-110° C. Additional toluene (114 ml) was added to create a homogeneous solution. The solution was cooled to 3° C. over 7 hours and then held at 3° C. for one hour. The resulting solid was isolated by filtration and rinsed with acetone (2×). The wet solid was dried in vacuo at 80° C. to yield 42.6 g (75%) of (R)-9-[2-(hydroxy)propyl]adenine (HPA) as an off-white solid. Mp: 188-190° C. The reaction was cooled to 100° C. while maintaining the reaction temperature between 100-110° C The solution was cooled to 3° C. over 7 hours The resulting solid was isolated by filtration rinsed with acetone (2×) The wet solid was dried in vacuo at 80° C.