1-Methyl-3,5-bis-O-(2,4-dichlorobenzyl)-alpha-D-ribofuranoside

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ice-cold suspension of Dess-Martin periodinane (50.0 g, 118 mmol) in anhydrous CH2Cl2 (350 mL) under argon (Ar) was added a solution of the compound from Step A (36.2 g, 75 mmol) in anhydrous CH2Cl2 (200 mL) dropwise over 0.5 h. The reaction mixture was stirred at 0° C. for 0.5 h and then at room temperature for 3 days. The mixture was diluted with anhydrous Et2O (600 mL) and poured into an ice-cold mixture of Na2S2O3.5H2O (180 g) in saturated aqueous NaHCO3 (1400 mL). The layers were separated, and the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL), dried (MgSO4), filtered and evaporated to give the title compound (34.2 g) as a colorless oil, which was used without further purification in Step C below. at room temperature for 3 days The layers were separated the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL) dried (MgSO4) filtered evaporated

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ice-cold suspension of Dess-Martin periodinane (50.0 g, 118 mmol) in anhydrous CH2Cl2 (350 mL) under argon (Ar) was added a solution of the compound from Step A (36.2 g, 75 mmol) in anhydrous CH2Cl2 (200 mL) dropwise over 0.5 h. The reaction mixture was stirred at 0° C. for 0.5 h and then at room temperature for 3 days. The mixture was diluted with anhydrous Et2O (600 mL) and poured into an ice-cold mixture of Na2S2O3.5H2O (180 g) in saturated aqueous NaHCO3 (1400 mL). The layers were separated, and the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL), dried (MgSO4), filtered and evaporated to give the title compound (34.2 g) as a colorless oil, which was used without further purification in Step C below. at room temperature for 3 days The layers were separated the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL) dried (MgSO4) filtered evaporated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78: 486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min. and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ice-cold suspension of Dess-Martin periodinane (50.0 g, 118 mmol) in anhydrous CH2Cl2 (350 mL) under argon (Ar) was added a solution of the compound from Step A (36.2 g, 75 mmol) in anhydrous CH2Cl2 (200 mL) dropwise over 0.5 h. The reaction mixture was stirred at 0° C. for 0.5 h and then at room temperature for 3 days. The mixture was diluted with anhydrous Et2O (600 mL) and poured into an ice-cold mixture of Na2S2O3.5H2O (180 g) in saturated aqueous NaHCO3 (1400 mL). The layers were separated, and the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL), dried (MgSO4), filtered and evaporated to give the title compound (34.2 g) as a colorless oil, which was used without further purification in Step C below. at room temperature for 3 days The layers were separated the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL) dried (MgSO4) filtered evaporated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorobenzyl)-1-O-methyl-α-D-ribofuranose (2-1) [for preparation, see: Helv. Chim. Acta 78: 486 (1995)](52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min. and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ice-cold suspension of Dess-Martin periodinane (50.0 g, 118 mmol) in anhydrous CH2Cl2 (350 mL) under argon (Ar) was added a solution of the compound from Step A (36.2 g, 75 mmol) in anhydrous CH2Cl2 (200 mL) dropwise over 0.5 h. The reaction mixture was stirred at 0° C. for 0.5 h and then at room temperature for 3 days. The mixture was diluted with anhydrous Et2O (600 mL) and poured into an ice-cold mixture of Na2S2O3.5H2O (180 g) in saturated aqueous NaHCO3 (1400 mL). The layers were separated, and the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL), dried (MgSO4), filtered and evaporated to give the title compound (34.2 g) as a colorless oil, which was used without further purification in Step C below. at room temperature for 3 days The layers were separated the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL) dried (MgSO4) filtered evaporated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78: 486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78: 486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78: 486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min. and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78: 486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min. and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ice-cold suspension of Dess-Martin periodinane (50.0 g, 118 mmol) in anhydrous CH2C12 (350 mL) under argon (Ar) was added a solution of the compound from Step A (36.2 g, 75 mmol) in anhydrous CH2C12 (200 mL) dropwise over 0.5 h. The reaction mixture was stirred at 0° C for 0.5 h and then at room temperature for 3 days. The mixture was diluted with anhydrous Et2O (600 mL) and poured into an ice-cold mixture of Na2S2O3.5H2O (180 g) in saturated aqueous NaHCO3 (1400 mL). The layers were separated, and the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL), dried (MgSO4), filtered and evaporated to give the title compound (34.2 g) as a colorless oil, which was used without further purification in Step C below. at room temperature for 3 days The layers were separated the organic layer was washed with saturated aqueous NaHCO3 (600 mL), water (800 mL) and brine (600 mL) dried (MgSO4) filtered evaporated

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

Procedure: A mixture of 2-O-acetyl-3,5-bis-O-(2,4-dichlorophenylmethyl)-1-O-methyl-α-D-ribofuranose [for preparation, see: Helv. Chim. Acta 78:486 (1995)] (52.4 g, 0.10 mol) in methanolic K2CO3 (500 mL, saturated at room temperature) was stirred at room temperature for 45 min. and then concentrated under reduced pressure. The oily residue was suspended in CH2Cl2 (500 mL), washed with water (300 mL+5×200 mL) and brine (200 mL), dried (Na2SO4), filtered, and concentrated to give the title compound (49.0 g) as colorless oil, which was used without further purification in Step B below. concentrated under reduced pressure washed with water (300 mL+5×200 mL) and brine (200 mL) dried (Na2SO4) filtered concentrated