Borane;tetrahydrofuran → HCID 23541641, compound

HRID 1793686Notes

Reaction equation

HRID 1793686 reaction equation
B1(C)OC(C2C=CC=CC=2)(C2C=CC=CC=2)[C@H]2N1CCC2.B.C1COCC1.[Cl:28][CH2:29][C:30]([C:32]1[CH:41]=[C:40]([Cl:42])[C:35]2[NH:36][C:37](=[O:39])[O:38][C:34]=2[CH:33]=1)=[O:31]>C1COCC1>[Cl:28][CH2:29][C@H:30]([C:32]1[CH:41]=[C:40]([Cl:42])[C:35]2[NH:36][C:37](=[O:39])[O:38][C:34]=2[CH:33]=1)[OH:31]

Participants

5

Reactant 3

HCID 2723981Borane;tetrahydrofuran2×HCID 2734713(3aS)-1-methyl-3,3-diphenyl-hexahydropyrrolo(1,2-c)(1,3,2)oxazaboroleHCID 220213726-Chloroacetyl-4-chloro-2-benzooxazolinone

Product 1

HCID 23541641HCID 23541641, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (S)-Methyl-CBS-oxazaborolidine (1M in toluene, 0.745 mL, 0.745 mmol) and BH3-THF (8 mL, 8 mmol) is added at the same time a solution of BH3-THF (19 mL, 19 mmol) and a solution of the 6-Chloroacetyl-4-chloro-2-benzooxazolinone (37.98 mmol) in 19 mL of THF. Both solutions are added dropwise over 30 minutes. The solution is stirred for 1 hour and quenched with the slow addition of methanol (50 mL). The solution is concentrated and the residue chromatographed over a short silica gel column (1:1 hexane/ethyl acetate).

Workup

  1. additionBoth solutions are added dropwise over 30 minutes
  2. customquenched with the slow addition of methanol (50 mL)
  3. concentrationThe solution is concentrated
  4. customthe residue chromatographed over a short silica gel column (1:1 hexane/ethyl acetate)

Sources & evidence

ORD record
ord-e68f57257c354f5096eee9a9dd79a3af
Source dataset
uspto-grants-2006_07
Patent number
US07081454B2

Reaction notes

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