Acetonide

Protection :
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ReagentsTimeYield
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Camphorsulfonic acid 2,2-Dimethoxypropane2 - 7 h82-86 %
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Pyr.TsOH 2,2-Dimethoxypropane60 min88 %Pyr.TsOH, 2,2-DimethoxypropaneDMFRT, 60 min, 88%
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Camphorsulfonic acid 2-Methoxypropene18 h95 %Camphorsulfonic acid, 2-MethoxypropeneTHFRT, 18 h, 95%
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CuSO436 h83 %CuSO4AcetoneRT, 36 h, 83%