4-Cyanobutyric acid ethyl ester

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ethyl 4-cyanobutyrate (approximately 15 g) was dissolved in DME. Tris(n-butyl)tin azide (5 ml) was added and the reaction solution was heated to 85° overnight then cooled to room temperature. The cooled solution was diluted with methanol (20 ml) then 1N hydrochloric acid (20 ml) was added. The solution was stirred for one hour then partitioned between ethyl acetate and water. The organic layer was separated, dried over magnesium sulfate and evaporated under reduced pressure. The residue was chromatographed by preparatory-scale HPLC (silcia column) eluted with a gradient of 30 to 70% ethyl acetate in hexane plus 1% acetic and to yield 3.39 g of the title product: n.m.r.(300 MHz, CDCl3) δ: 4.2 (q, 2H); 2.95 (t, 2H); 2.5 (t, 2H); 2.1 (t, 2H); 1.3 (t, 3H). the reaction solution was heated to 85° overnight then partitioned between ethyl acetate and water The organic layer was separated dried over magnesium sulfate evaporated under reduced pressure The residue was chromatographed by preparatory-scale HPLC (silcia column) eluted with a gradient of 30 to 70% ethyl acetate in hexane plus 1% acetic

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ethyl 4-cyanobutyrate (approximately 15 g) was dissolved in DME. Tris(n-butyl)tin azide (5 ml) was added and the reaction solution was heated to 85° overnight then cooled to room temperature. The cooled solution was diluted with methanol (20 ml) then 1N hydrochloric acid (20 ml) was added. The solution was stirred for one hour then partitioned between ethyl acetate and water. The organic layer was separated, dried over magnesium sulfate and evaporated under reduced pressure. The residue was chromatographed by preparatory-scale HPLC (silcia column) eluted with a gradient of 30 to 70% ethyl acetate in hexane plus 1% acetic and to yield 3.39 g of the title product: n.m.r.(300 MHz, CDCl3) δ: 4.2 (q, 2H); 2.95 (t, 2H); 2.5 (t, 2H); 2.1 (t, 2H); 1.3 (t, 3H). the reaction solution was heated to 85° overnight then partitioned between ethyl acetate and water The organic layer was separated dried over magnesium sulfate evaporated under reduced pressure The residue was chromatographed by preparatory-scale HPLC (silcia column) eluted with a gradient of 30 to 70% ethyl acetate in hexane plus 1% acetic