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General Procedure for the Iodination of Terminal Alkynes To MeCN (3 mL, alkyne 1 (0.5 mmol, DIB (0.5 mmol, Et3N (1.0 mmol, KI (1.0 mmol, and CuI (5.0 mol, were added. The mixture was stirred at r.t. for 0.3-0.5 h and then separated on a silica gel plate using PE as eluent, 1-iodoalkyne 2 was afforded in good to excellent yield. Compound 2a: Oil. 1H NMR (400 MHz, CDCl3, δ, 7.44-7.42 (m, 2 H, 7.32-7.29 (m, 3 H, 13C NMR (100 MHz, CDCl 3, δ, 132.3, 128.8, 128.2, 1234, 94.1, 6.1. IR (film, ν, 2175, 755, 690 cm-1. MS (EI, m/z, 228 (100, M, Compound 2b: Oil. 1H NMR (400 MHz, CDCl 3, δ, 7.32 (d, J, 8.4 Hz, 2 H, 7.11 (d, J, 8.0 Hz, 2 H, 2.35 (s, 3 H, 13C NMR (100 MHz, CDCl3, δ, 139.0, 132.2, 129.0, 120.3, 94.2, 21.5, 4.9. IR film, ν, 2170, 818 cm-1
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