Formaldehyde → HCID 24822637, compound

HRID 1823076Notes

Reaction equation

HRID 1823076 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][CH2:9][N:10]([CH2:18][C@@H:19]([C:21]2[CH:26]=[CH:25][CH:24]=[C:23]([Cl:27])[CH:22]=2)[OH:20])[C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[CH:4][CH:3]=1.C=O.[C:30](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].[OH-].[Na+]>ClCCCl.C(Cl)(Cl)Cl>[Cl:27][C:23]1[CH:22]=[C:21]([C@@H:19]([OH:20])[CH2:18][N:10]([CH2:9][CH2:8][C:5]2[CH:6]=[CH:7][C:2]([NH:1][CH3:30])=[CH:3][CH:4]=2)[C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])[CH:26]=[CH:25][CH:24]=1

Participants

7

Reactant 4

HCID 712FormaldehydeHCID 14798Sodium HydroxideHCID 5049666Sodium triacetoxyborohydrideHCID 24823937HCID 24823937, compound

Product 1

HCID 24822637HCID 24822637, compoundYield 30.3%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 6212ChloroformSolvent

Procedure

To a solution of tert-butyl [2-(4-aminophenyl)ethyl][(2R)-2-(3-chlorophenyl)-2-hydroxyethyl]carbamate (1.75 g) and formaldehyde (37% w/w solution in water, 390 μl) in 1,2-dichloroethane (20 ml) was added sodium triacetoxyborohydride (1.23 g), and the mixture was stirred at room temperature for 18 hours under nitrogen atmosphere. The resulting mixture was poured into a mixture of 1N sodium hydroxide and chloroform, and the mixture was stirred for 20 minutes. The organic layer was separated, washed with brine, dried over magnesium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel (hexane/ethyl acetate=2/1) to give tert-butyl [(2R)-2-(3-chlorophenyl)-2-hydroxyethyl][2-[4-(methylamino)phenyl]ethyl]carbamate (550 mg).

Workup

  1. stirringthe mixture was stirred for 20 minutes
  2. customThe organic layer was separated
  3. washwashed with brine
  4. dry with materialdried over magnesium sulfate
  5. customevaporated under reduced pressure
  6. customThe residue was purified by column chromatography on silica gel (hexane/ethyl acetate=2/1)

Sources & evidence

ORD record
ord-cd481e520a424a54940e58f8da2a3fb8
Source dataset
uspto-grants-2006_05
Patent number
US07037938B2

Reaction notes

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