Triethylamine → HCID 71236895, compound

HRID 2173684Notes

Reaction equation

HRID 2173684 reaction equation
[CH:1]1[C:13]2[CH:12]([CH2:14][O:15][C:16](Cl)=[O:17])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.[CH3:19][NH:20][CH2:21][CH2:22][CH2:23][OH:24].C(N(CC)CC)C>ClCCl.[Cl-].[Na+].O>[OH:24][CH2:23][CH2:22][CH2:21][N:20]([CH3:19])[C:16](=[O:17])[O:15][CH2:14][CH:12]1[C:11]2[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=2[C:5]2[C:13]1=[CH:1][CH:2]=[CH:3][CH:4]=2

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 343679-Fluorenylmethyl chloroformateHCID 101489863-(Methylamino)-1-propanol

Product 1

HCID 71236895HCID 71236895, compoundYield 100%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 57417360Sodium chloride; waterSolvent

Procedure

A solution of 9-fluorenylmethoxycarbonyl chloride (15.22 g, 58.85 mmol) in dichloromethane (100 ml) was added over 1 h to an ice-cooled solution of 3-methylamino-1-propanol (5.25 g, 58.85 mmol) and triethylamine (9.0 ml, 64.74 mmol) in dichloromethane (50 ml). The resultant suspension was left overnight at −18° C., and then diluted with brine. The organic phase was separated, dried over MgSO4 and concentrated in vacuo. The residue was purified on silica eluting with 1:4 ethyl acetate/dichloromethane to give (9H-fluoren-9-yl)methyl 3-hydroxypropylmethylcarbamate (100% yield). p-Toluoyl chloride (4.26 g, 27.56 mmol) was added dropwise over 10 min to an ice-cooled solution of (9H-fluoren-9-yl)methyl 3-hydroxypropylmethylcarbamate (7.8 g, 25.05 mmol) in pyridine (100 ml). The resultant mixture NA as stirred for 2 h at 0° C., concentrated in vacuo and redissolved in ethyl acetate. The solution was washed with 10% citric acid and brine, then separated, dried over MgSO4 and concentrated in vacuo. The residue was purified on silica eluting with 30% ethyl acetate/hexane to give (9H-fluoren-9-yl)methyl 3-(4-methylbenzoyloxy)propylmethylcarbamate (97% yield). A solution of (9H-fluoren-9-yl)methyl 3-(4-methylbenzoyloxy)propylmethylcarbamate (0.91 g, 2.12 mmol) and triethylamine (5.0 ml) in DMF (5 ml) was stirred for 1 h at +80° C. The resultant mixture was cooled to room temperature and compound 1 (2.01 g, 1.74 mmol) was added. The reaction was diluted with DMF (5), stirred for 2 days, and then diluted with ether (100 ml). The precipitated solid was isolated by filtration, washed with ether and vacuum dried to afford compound 2b (89% yield) as a pale solid, which was sufficiently pure to be used in the next step without additional purification.

Workup

  1. customThe organic phase was separated
  2. dry with materialdried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customThe residue was purified on silica eluting with 1:4 ethyl acetate/dichloromethane

Sources & evidence

ORD record
ord-996a0cf957c34004a18f99e3768f6c52
Source dataset
uspto-grants-2015_06
Patent number
US09056887B2

Reaction notes

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