Azido(trimethyl)stannane → HCID 178418841, compound

Participants

Reaction Steps

To a solution of nitrile (238) (0.68 g, 1.63 mmol) prepared as described in example 98 in toluene/dimethylformamide (5:1, 120 mL) was added azidotrimethyl tin (0.67 g, 3.26 mmol). The resulting solution was heated at reflux for 24 hours before a further portion of azidotrimethyl tin (0.34 g, 1.63 mmol) was added. After a further 24 hours at reflux the reaction was diluted with water and extraction with ethyl acetate. The organic phase was dried, the drying agent was removed and the solution was concentrated to dryness. Chromatography on silica eluting with ethyl acetatelhexane (3:1) to ethyl acetate/methanol (9:1), followed by crystallization from ethyl acetate/hexane, gave tetrazole (272) (0.54 g, 72%) as an orange powder, mp 230–234° C. (dec). 1H NMR δ [(CD3)2SO] 11.06 (br s, 1H), 9.37 (br s, 1H), 8.36 (d, J=2.4 Hz, 1H), 7.61 (s, 1H), 7.56 (m, 1H), 7.48 (m, 4H), 7.10 (dd, J=8.8, 2.4 Hz, 1H), 4.82 (t, J=6.9 Hz, 2H), 3.32 (obscured t, J=6.9 Hz, 2H). Found: C, 52.69; H, 4.05; N, 15.91. C23H15ClN6O3.31/2H2O requires: C, 52.93; H, 4.25; N, 16.09.

Provenance & Evidence