tert-Butanol → 2-((1S)-1,2-dihydroxyethyl)-4,5-diphenyloxazole

HRID 1741387Notes

Reaction equation

HRID 1741387 reaction equation
CC[C@@H]1[C@@H]2C[C@H]([C@@H](OC3C4C(=CC=CC=4)C(O[C@@H](C4C=CN=C5C=4C=C(OC)C=C5)[C@@H]4N5C[C@H](CC)[C@@H](CC5)C4)=NN=3)C3C=CN=C4C=3C=C([O:22]C)C=C4)N(CC2)C1.CS(N)(=O)=O.C(C1[O:67][C:68]([C:77]2[CH:82]=[CH:81][CH:80]=[CH:79][CH:78]=2)=[C:69]([C:71]2[CH:76]=[CH:75][CH:74]=[CH:73][CH:72]=2)[N:70]=1)=C.S([O-])([O-])=O.[Na+].[Na+].[C:89]([OH:93])([CH3:92])([CH3:91])C>O>[OH:93][C@H:89]([C:92]1[O:67][C:68]([C:77]2[CH:82]=[CH:81][CH:80]=[CH:79][CH:78]=2)=[C:69]([C:71]2[CH:76]=[CH:75][CH:74]=[CH:73][CH:72]=2)[N:70]=1)[CH2:91][OH:22]

Participants

7

Reactant 5

HCID 6386tert-ButanolHCID 24437Sodium SulfiteHCID 72879MethanesulfonamideHCID 108902322-Vinyl-4,5-diphenyloxazoleHCID 112172021,4-Bis(dihydroquinidine)phthalazine

Product 1

HCID 569827262-((1S)-1,2-dihydroxyethyl)-4,5-diphenyloxazole

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A solution of AD-mix-β (trade name, Aldrich) (114 g) in a mixture of t-butyl alcohol (400 ml) and water (400 ml) was stirred for 1 hour, and then methanesulfonamide (7.6 g) and 2-vinyl-4,5-diphenyloxazole (20 g) was added to the solution at 0° C. After being stirred for 8 hours at the same temperature, sodium sulfite (50 g) was added, and the mixture was stirred for 30 minutes. The mixture was partitioned between ethyl acetate and water. The organic layer was washed with 1N-HCl solution, sat. NaHCO3, and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by trituration with hexane-ether to afford 2-((1S)-1,2-dihydroxyethyl)-4,5-diphenyloxazole (21 g). MS (m/z): 282 (M+ +1) IR (Neat): 3400 cm-1NMR (CDCl3, δ): 4.03 (1H, d, J=4.6 Hz), 4.90 (1H, t, J=4.6 Hz), 7.2-7.6 (10H, m)

Workup

  1. additionwas added
  2. stirringthe mixture was stirred for 30 minutes
  3. customThe mixture was partitioned between ethyl acetate and water
  4. washThe organic layer was washed with 1N-HCl solution, sat. NaHCO3, and brine
  5. dry with materialdried over MgSO4
  6. customevaporated in vacuo
  7. customThe residue was purified by trituration with hexane-ether

Sources & evidence

ORD record
ord-7eb5a657be424393a1fb816cec409f8c
Source dataset
uspto-grants-1999_10
Patent number
US05972965

Reaction notes

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