Hydroxylamine → HCID 178472247, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 1-(2-trimethylsilanyloxyethoxy)cyclobutanecarbonitrile (3.5 g, 16.4 mmol) and 50% aqueous hydroxylamine (1.08 g, 16.4 mmol) in EtOH (16 mL) was stirred in an oil bath heated at 80° C. for 2.5 hrs and then cooled to room temperature. To a solution was added drop-wise diethyl acetylenedicarboxylate (2.93 g, 17.2 mmol) in an ice-bath and the mixture stirred at room temperature for 5 hrs. This mixture was concentrated under vacuum to obtain 6.16 g of a crude brownish oil containing intermediate 21: 1H NMR (500 MHz, CDCl3) δ: 1.19-1.38 (6H, m) 1.72-1.86 (2H, m) 2.06-2.24 (2H, m) 2.29-2.49 (2H, m) 3.26-3.38 (2H, m) 3.63-376 (2H, m) 4.11-4.19 (2H, m) 4.24-4.38 (2H, m) 5.67 (0.25H, s) 5.85 (0.5H, s). HRMS (M+H) calcd for C15H25N2O7: 345.1662; found: 345.1648.

Herkunft & Nachweise