Phenethyl bromide → HCID 467114, compound

Participants

Reaction Steps

Magnesium (0.146 g) in anhydrous ether (15 mL) was treated with (2-bromoethyl)-benzene (0.82 mL) and reacted for 2.5 hours. The Grignard reagent was treated with solid 7-Fluoro-imidazo [2,1-b]benzothiazole-3-carboxaldehyde (Formula L-3) (0.44 g). Incomplete conversion was observed, an additional charge of Grignard reagent was added, and reacted for 24 hours. The reaction mixture was decanted into 5% ammonium chloride solution and extracted with ethyl acetate. The extract was washed, dried, and evaporated to a solid residue (0.60 g) of crude 7-Fluoro-α-(2-phenylethyl)imidazo[2,1-b]benzothiazole-3-methanol (Formula L-4). Crystallization from isopropanol solution gave pure 7-Fluoro-α-(2-phenylethyl) imidazo[2,1-b]benzothiazole-3-methanol (Formula L-4), m.p. 195-196°. Anal. Calcd for C18H15FN2OS. C, 66.24; H, 4.63; N, 8.58; S, 9.82. Found: C, 66.08; H, 4.64; N, 8.48; S, 9.72. MS m/z 326 (M+), 235, 221, 205, 193, 179, 193, 179, 166, 152, and 91. IR (mull). 3301, 1547, 1486, 1321, 1260, 1208, 1200, 1133, and 1039 cm−1. NMR (CDCl3/CD3OD) δ2.33 (q, J=7.6 Hz, 2, CH2), 2.76-3.0 (m, 2, CH2), 5.00 (t, J=7.6 Hz, 1, CH), 7.1-7.4 (m, 9, ArH, CH), 8.01 (m, 1, ArH).

Provenance & Evidence