Hydrochloric Acid → HCID 13375280, compound

HRID 2413604Notes

Reaction equation

HRID 2413604 reaction equation
[CH:1]1[C:14]2[C:5](=[CH:6][C:7]3[C:12]([C:13]=2[CH:15]=O)=[CH:11][CH:10]=[CH:9][CH:8]=3)[CH:4]=[CH:3][CH:2]=1.[CH3:17][C:18]([NH2:23])([CH2:21][OH:22])[CH2:19][OH:20].C1(C)C=CC(S(O)(=O)=O)=CC=1.[BH3-]C#N.[Na+].CC1C(Br)=C(O)C(Br)=CC=1C1(C2C=C(Br)C(O)=C(Br)C=2C)OS(=O)(=O)C2C=CC=CC1=2.[ClH:70]>CCO.CCOCC.O.C1(C)C=CC=CC=1>[ClH:70].[CH:11]1[C:12]2[C:7](=[CH:6][C:5]3[C:14]([C:13]=2[CH2:15][NH:23][C:18]([CH3:17])([CH2:21][OH:22])[CH2:19][OH:20])=[CH:1][CH:2]=[CH:3][CH:4]=3)[CH:8]=[CH:9][CH:10]=1

Participants

11

Reactant 6

HCID 313Hydrochloric Acid2×HCID 15312-Amino-2-methyl-1,3-propanediolHCID 6101p-Toluenesulfonic acidHCID 6451Bromocresol GreenHCID 695049-AnthracenecarboxaldehydeHCID 5003444Sodium cyanoborohydride2×

Product 1

HCID 13375280HCID 13375280, compoundYield 40%

Reagents, catalysts & solvents 4

HCID 702EthanolSolvent3×HCID 962WaterSolvent2×HCID 1140TolueneSolventHCID 3283Diethyl EtherSolvent

Procedure

To a 2 L Erlenmeyer flask was added 9-anthracenecarbaldehyde (Aldrich Chemical Co., Milwaukee, WI., 53201, 20.63 g, 0.1 mol) 2-methyl-2-amino-1,3-propanediol (Aldrich, 9.13 g, 86.8 mmol), p-toluenesulfonic acid.H2O (Eastman Kodak Co., Rochester, NY, 14650, 0.1 g, 0.5 mmol), and PhCH3 (500 mL). The mixture was warmed to reflux for a few minutes and H2O (2-3 mL) was driven off. The resulting golden colored solution was allowed to cool to RT, diluted with absolute EtOH (500 mL) and stirred overnight. NaBH3CN (Aldrich, 95%, 2.51 g, 42 mmol) was added to the reaction. After the NaBH3CN dissolved, an indicator (bromocresol green, Eastman, 5 mg) was added. To the resulting solution was added 5 drops of 1M solution of HCl gas in absolute EtOH every 15 minutes. After 3 days the indicator turned green then yellow and voluminous white precipitate was present in the flask. To the flask was then added 1M HCl gas (10 mL) in absolute EtOH. The reaction was diluted to 4 L with Et2O and stirred for 1 h. The precipitate was then collected by filtration through a medium porosity glass fritted funnel and pressed dry. The filter cake was washed with CH2Cl2 (4×500 mL), pressed and sucked dry, and dried (100°). The crude solid was recrystallized from EtOH/Et2O (3×) to give 13.44 g (40%) of 2-((9-anthracenylmethyl)amino)-2-methyl-1,3-propanediol hydrochloride mp 139°-140° (dec), (C,H,Cl,N).

Workup

  1. temperatureThe mixture was warmed
  2. temperatureto reflux for a few minutes
  3. waitAfter 3 days the indicator turned green
  4. stirringstirred for 1 h
  5. filtrationThe precipitate was then collected by filtration through a medium porosity glass fritted funnel
  6. custompressed dry
  7. washThe filter cake was washed with CH2Cl2 (4×500 mL)
  8. customsucked dry
  9. customdried (100°)
  10. customThe crude solid was recrystallized from EtOH/Et2O (3×)

Sources & evidence

ORD record
ord-1fa33c5103a9411f8138544088f5f206
Source dataset
uspto-grants-1988_01
Patent number
US04719047

Reaction notes

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