Water → HCID 178514622, compound

To a solution of trans methyl 3-azidocyclobutane carboxylate (2.38 g, 15.3 mmol) in methanol (5 ml) was added water (5 ml). The resulting cloudy mixture was stirred vigorously and treated dropwise (0.5 h) with an aqueous solution of sodium hydroxide (1 N, 15.3 ml) at such a rate that the temperature was kept under 25° C. The reaction mixture was stirred at 23° C. for 2 h and the methanol was evaporated in vacuo to a slightly yellow residue which was diluted with water (10 ml). The aqueous solution was washed with ether (2×10 ml), acidified with 1 N hydrochloric acid and extracted with dichloromethane (4×25 ml). The organic extracts were combined, washed with water, dried over anhydrous sodium sulfate and concentrated to a colorless oil which solidified on standing; 2.02 g, 93%; mp 39°-41° C. Anal. calcd for C5H7N3O2 : C 42.55, H 5.00, N 29.78; found: C 42.41; H 5.02, N 29.59; ir (KBr) νmax : 2100 (N3) and 1705 cm-1 with shoulder at 1735 (C=O of carboxylic acid); 1Hmr (CDCl3) δ: 4.19 (1H, m, H-1) and 3.5-2.0 ppm (5H, H-2, H-3, H-4).

1. customwas kept under 25° C
2. stirringThe reaction mixture was stirred at 23° C. for 2 h
3. customthe methanol was evaporated in vacuo to a slightly yellow residue which
4. additionwas diluted with water (10 ml)
5. washThe aqueous solution was washed with ether (2×10 ml)
6. extractionextracted with dichloromethane (4×25 ml)
7. washwashed with water
8. dry with materialdried over anhydrous sodium sulfate
9. concentrationconcentrated to a colorless oil which

ORD record

ord-7e733a8617f84bbeb545993e757c314f

Source dataset

uspto-grants-1981_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04272437