(3-hydroxyphenyl)boronic Acid → 3-(2,8-Dimethoxy-10,11-dihydro-dibenzo[a,d]cyclohepten-5-ylidenemethyl)-phenol

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Following procedures essentially as described in Example 219, below, and using 3-hydroxyphenyl boronic acid (304 mg, 2.2 mmol) with 5-bromomethylene-2,8-dimethoxy-10,11-dihydro-5H-dibenzo[a,d]cycloheptene (690 mg, 2 mmol) to give 990 mg crude product. Purify the crude product using column chromatography eluting with 8% EtOAc/hexane to 25% EtOAc/hexane to give 240 mg (33%) product as a colorless oil. MS (ES) 357 (M−1). HPLC shows 99% purity at t=3.33 min.

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