Triethylamine → 1,4-Dioxaspiro[4.4]non-7-ene

Participants

Reaction Conditions

Reaction Steps

To a solution of trimethylsilyl trifluoromethanesulfonate (CAS number 27607-77-8; 0.22 ml, 1.22 mmol) in DCM (12 ml) at −78° C. was successively added 2,2,7,7-tetramethyl-3,6-dioxa-2,7-disilaoctane (CAS number 7381-30-8; 2.51 g, 12.18 mmol) and cyclopent-3-en-1-one (CAS number 14320-37-7; 1 g, 12.18 mmol). The reaction mixture was stirred at −78° C. for 3 hours, quenched with triethylamine (2 ml, 14.35 mmol), poured into a saturated solution of sodium bicarbonate and extracted with diethyl ether. The organics were dried over sodium sulfate, filtered and concentrated in vacuo to afford the title compound.

Provenance & Evidence