Sodium Iodide → Ethyl 1-(4-iodobutyl)-1-cyclobutanecarboxylate

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Compound 105b was prepared, likewise the procedure described for 5a, starting from ethyl 1-(4-chlorobutyl)-1-cyclobutanecarboxylate (104b, 21.21 g, 97.0 mmol) and NaI (19.07 g, 127 mmol) to give 105b (29.91 g, 99%) as a slightly yellow oil. 1H NMR: δ 4.14 (q, J=7.1 Hz, 2H), 3.17 (t, J=6.9 Hz, 2H), 2.49-2.32 (m, 2H), 1.98-1.69 (m, 8H), 1.37-1.19 (m, 2H), 1.27 (t, J=7.1 Hz, 3H). 13C NMR: δ 176.5, 60.3, 47.5, 36.9, 33.7, 30.1 (2×), 26.0, 15.7, 14.5, 6.8.

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