Isopropyl 3-aminopropyl(ethyl)phosphinate → Cgp-36216

Participants

Reaction Steps

A mixture of 7.73 g of isopropyl 3-aminopropyl(ethyl)-phosphinate and 40 ml of 20% hydrochloric acid is refluxed with stirring for 14 hours. The clear solution is evaporated to dryness and the residue is recrystallized from methanol/propylenoxide to give 3-aminopropyl(ethyl)phosphinic acid as a white solid, m.p. 233°-239°; 1H-NMR (D2O): 0.4-1.8 (m, 9H, PCH2CH2 and PCH2CH3); 2.7 (t, 2H, NCH2); 4.55 (s, 3H, OH, NH2).

Provenance & Evidence