Cyclopropylacetylene → 2-Tert-butoxy-2-(1-(4-chlorophenyl)-7-(cyclopropylethynyl)-3-methylnaphthalen-2-yl)acetic acid

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2-tert-Butoxy-2-(1-(4-chlorophenyl)-7-(cyclopropylethynyl)-3-methylnaphthalen-2-yl)acetic acid (75) was prepared by the method of Example 67 from ethyl 2-(7-bromo-1-(4-chlorophenyl)-3-methylnaphthalen-2-yl)-2-tert-butoxyacetate using ethynylcyclopropane. 1H-NMR: 400 MHz, (CD3OD) δ: 7.69 (m, 2H), 7.57 (m, 3H), 7.32 (m, 2H), 7.18 (s, 1H), 5.16 (s, 1H), 2.59 (s, 3H), 1.42 (br m, 1H), 0.97 (s, 9H), 0.83 (br m, 2H), 0.68 (br m, 2H). HPLC (Kinetex 2.6u, 50×4.6 mm, 2-100% MeCN/H2O+0.05% HOAc, 5 min run): tR (min)=3.78.

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