Diisopropylamine → HCID 20366327, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred solution of 84 ml of diisopropylamine in 280 ml of dry tetrahydrofuran (THF) is added 260 ml of 2.3M n-butyllithium in hexane during 30 min. at 0°-5° C. After stirring for 25 min. at -5° C. the solution is cooled to -75° C. and treated with a solution of 113g (0.58 mol) of 1-ethoxyethyl ether of furfural cyanohydrin (Example 1) in 115 ml of hexamethylphosphoric triamide during 45 min. at -75° to -65° C. After stirring for 25 min. at -75° C. the solution is treated with 136g (0.576 mol) of ethyl 7-bromoheptanoate during 40 min. -75° to -65° C. After slow addition of 280 ml of TMF as rinse the mixture is stirred at -75° C. for 2.5 hr. and at ambient temperature for 18 hr. The reaction mixture is partitioned with water and ether. The ether phase is washed with brine, dried over sodium sulfate, filtered through Celite, and concentrated.

Herkunft & Nachweise