Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 624-76-0, name is 2-Iodoethanol, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of 2-Iodoethanol
[00396] To a jacketed glass reactor equipped with overhead stirring, was charged tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-3-(((2S,3R)-6-(aminomethyl)-3-((tert- butoxycarbonyl)amino)-3,4-dihydro-2H-pyran-2-yl)oxy)-4-((tert-butoxycarbonyl)amino)-6- ((S)-4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-2-hydroxycyclohexyl)oxy)-3,5- dihydroxy-5-methyltetrahydro-2H-pyran-4-yl)(methyl)carbamate, formula (6a), (250 g, 0.263 mol, 1 equiv). Acetonitrile (1250 mL) was charged to the reactor and the temperature was stabilized between 15 and 30 C (24.3 C). The mixture was concentrated under vacuum to a final volume target of 500 mL. The solution was sampled for water content by KF which provided a result of 0.22% w/w. An additional portion of acetonitrile (750 mL) was charged to the reactor and a second azeotropic distillation was performed to a volume target of 500 mL. The mixture was sampled for KF and a result of 0.097%> w/w was obtained. The reaction temperature was stabilized at 29.9 C and acetone (1250 mL) was charged to the mixture. The reaction was heated and the temperature stabilized at 29.9 C. Sodium bicarbonate (44.25 g, 0.527, 2.0 equiv) was charged to the reaction mixture followed by 2-iodoethanol (44.4 g, 20.14 mL, 0.258 mol, 0.98 equiv). After 43 h an additional portion of 2-iodoethanol (0.25 mL) was added to the reaction mixture. After 9.5 hours a third portion of 2-iodoethanol (0.3 mL) was added to the reaction mixture. After an additional 2 h, the reaction was sampled and deemed complete by HPLC analysis (consumption of tert-butyl ((2R,3R,4R,5R)-2- (((l S,2S,3R,4S,6R)-3-(((2S,3R)-6-(aminomethyl)-3-((tert-butoxycarbonyl)amino)-3,4- dihydro-2H-pyran-2-yl)oxy)-4-((tert-butoxycarbonyl)amino)-6-((S)-4-((tert- butoxycarbonyl)amino)-2-hydroxybutanamido)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5- methyltetrahydro-2H-pyran-4-yl)(methyl)carbamate, formula (6a),). The reaction was cooled to 22.7 C and l,4-diazabicyclo[2.2.2]octane (60.0 g, 0.535 mol, 2.03 equiv) was charged as a solid. The destruction of 2-iodoethanol was monitored by a GC method and after 10 h the quench of this reagent was deemed complete. Water (1250 mL) and isopropyl acetate (1250 mL) were charged to the reaction mixture. The reactor contents were agitated by 25 min and the layers allowed to separate. The lower aqueous layer (API) and the upper organic layer (OP1) were collected in receivers. API was returned to the reactor and a second portion of isopropyl acetate (750 mL) was charged. The reactor contents were agitated for 30 minutes and the layers allowed to separate. The lower aqueous layer (AP2) and the upper organic layer (OP2) were collected in receivers. OP1 and OP2 were combined in the reactor and extracted with two portions of saturated sodium chloride solution (750 mL, prepared by dissolving 100 g NaCl/290 mL of water). The washed organic phase (OP4) was concentrated under vacuum to a volume target of 500 mL. Acetonitrile (2550 mL) was charged to the reactor. A second azeotropic vacuum distillation was performed to a volume target of 1550 mL. Isopropyl acetate (200 mL) was charged to the mixture. Water (10.7 mL) was charged to the mixture until a KF of 0.85% was obtained. The reactor contents were heated to 75 C upon which a solution was obtained. The reaction mixture was cooled to 57 C and seeded with tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-4-((tert-butoxycarbonyl)amino)-6-((S)- 4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-3-(((2S,3R)-3-((tert- butoxycarbonyl)amino)-6-(((2-hydroxyethyl)amino)methyl)-3,4-dihydro-2H-pyran-2- yl)oxy)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5-methyltetrahydro-2H-pyran-4- yl)(methyl)carbamate, formula (7a), (5 g, 0.0050 mol, 0.02 equiv). Stirring was maintained at 57 C for 2 h during which a thick slurry formed. The mixture was cooled from 65 C to 2.5 C over a period of 12 h. The slurry was filtered and washed with acetonitrile (900 mL) and dried in a vacuum oven to afford tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-4-((tert- butoxycarbonyl)amino)-6-((S)-4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-3- (((2S,3R)-3-((tert-butoxycarbonyl)amino)-6-(((2-hydroxyethyl)amino)methyl)-3,4-dihydro- 2H-pyran-2-yl)oxy)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5-methyltetrahydro-2H-pyran- 4-yl)(methyl)carbamate, formula (7a), (218.1 g, 0.220 mol, 83% molar yield)
Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 624-76-0.