Trifluoroacetic acid → HCID 11325941, compound

Participants

Reaction Steps

To a stirred solution of 1,1-dimethylethyl (2E)-3-{4-[(4,4-dimethylcyclohexylidene)(4-hydroxyphenyl)methyl]phenyl}-2-propenoate (21) (0.24 g, 0.57 mmol) in CH2Cl2 (5 mL) was added trifluoroacetic acid (4 mL) at room temperature under a nitrogen atmosphere. The reaction mixture was stirred for 1 h and concentrated in vacuo to give an oil. The oil was dissolved in CH2Cl2 and the solvent was removed in vacuo to give a solid which was dried under vacuum at 90° C. to give 0.170 g (82%) of compound 22 as a pale tan solid. 1H NMR (400 MHz, DMSO-d6): δ 0.93 (s, 6H), 1.31 (m, 4H), 2.16 (m, 4H), 6.44 (d, J=15.9 Hz, 1H), 6.65 (d, J=8.4 Hz, 2H), 6.84 (d, J=8.3 Hz, 2H), 7.05 (d, J=7.9 Hz, 2H), 7.52 (d, J=15.9 Hz, 1H), 7.57 (d, J=8.1 Hz, 2H), 9.32 (s, 1H), 12.33 (br s, 1H). The compound was silated prior to EI analysis. HRMS (EI) Calcd for C30H42O3Si2: 506.2673 (M+.). Found: 506.2669.

Provenance & Evidence