C([O:5][CH2:6][CH:7]([CH3:20])[CH2:8][C:9](=[O:19])[CH2:10][CH:11]([CH3:18])[CH2:12][CH2:13][CH2:14][CH:15]([CH3:17])[CH3:16])(C)(C)C.FC(F)(F)C(O)=O>>[OH:5][CH2:6][CH:7]([CH3:20])[CH2:8][C:9](=[O:19])[CH2:10][CH:11]([CH3:18])[CH2:12][CH2:13][CH2:14][CH:15]([CH3:16])[CH3:17]Treatment of rac.-1-tert. butoxy-2,6,10-trimethylundecan-4-one with trifluoroacetic acid followed by alkali using the procedure described in Example 6 gave rac.-1-hydroxy-2,6,10-trimethylundecan-4-one as a pale-yellow oil.
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