Delta-Valerolactone → HCID 13105375, compound

Participants

Reaction Steps

1.6M n-Butyl lithium solution in hexane (56 ml) was added to a stirred solution of the phosphine oxide (31.0 g) in dry tetrahydrofuran (400 ml) at -40° to -45° C. under nitrogen. The deep orange solution was stirred for 10 minutes at -40° to -50° C., then a solution of valerolactone (9.0 g) in dry tetrahydrofuran was added. The pale solution was allowed to warm to room temperature, poured on to ice and extracted with ether. The extract was dried and evaporated and the residue was crystallised from ether-petroleum spirit to give 1-(5-hydroxypentanoyl)undecyl-diphenylphosphine oxide, m.p. 70° C.

Provenance & Evidence