Magnesium trifluoromethanesulfonate → (S)-Methyl 3-((R)-1-(tert-butyldimethylsilyloxy)propan-2-yloxy)-2-hydroxypropanoate

HRID 655724

Reaction equation

HRID 655724 reaction equation
FC(F)(F)S([O-])(=O)=O.[Mg+2].FC(F)(F)S([O-])(=O)=O.[O:18]1[CH2:20][C@H:19]1[C:21]([O:23][CH3:24])=[O:22].[Si:25]([O:32][CH2:33][C@H:34]([OH:36])[CH3:35])([C:28]([CH3:31])([CH3:30])[CH3:29])([CH3:27])[CH3:26]>>[Si:25]([O:32][CH2:33][C@H:34]([O:36][CH2:20][C@H:19]([OH:18])[C:21]([O:23][CH3:24])=[O:22])[CH3:35])([C:28]([CH3:31])([CH3:30])[CH3:29])([CH3:27])[CH3:26]

Participants

4

Reactant 3

HCID 2734125Magnesium trifluoromethanesulfonateHCID 10942355Methyl (2S)-2-oxiranecarboxylateHCID 13175135(2R)-1-{[(1,1-Dimethylethyl)(dimethyl)silyl]oxy}propan-2-ol

Product 1

HCID 59279501(S)-Methyl 3-((R)-1-(tert-butyldimethylsilyloxy)propan-2-yloxy)-2-hydroxypropanoateYield 39.8%

Conditions

Temperature
10 °C

Procedure

Magnesium trifluoromethanesulfonate (1.165 g, 3.61 mmol) was added in one portion to (S)-methyl oxirane-2-carboxylate (1.475 g, 14.45 mmol) and (R)-1-(tert-butyldimethylsilyloxy)propan-2-ol (CAS no. 136918-07-5) (2.75 g, 14.45 mmol) cooled to 10° C. The resulting suspension was stirred at 10° C. for 10 minutes and then warmed to 45° C. and stirred for 2 days. The crude product was purified by flash silica chromatography, eluting with 0 to 30% EtOAc in isohexane to afford the product (1.680 g, 39.8%). 1H NMR (400 MHz, DMSO) δ0.00 (s, 6H), 0.83 (s, 9H), 0.98 (d, 3H), 3.35-3.45 (m, 2H), 3.47-3.65 (m, 3H), 3.66 (s, 3H), 4.09-4.15 (m, 1H), 5.37 (d, 1H).

Workup

  1. temperaturewarmed to 45° C.
  2. stirringstirred for 2 days
  3. customThe crude product was purified by flash silica chromatography
  4. washeluting with 0 to 30% EtOAc in isohexane

Sources & evidence

ORD record
ord-ed7b30eaba0a4c8090814c7200ef6b43
Source dataset
uspto-grants-2011_12
Patent number
US08071608B2

Linked notes

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