Water → HCID 53835364, compound

Participants

Reaction Steps

A solution of CH3Li(1.95 M, 0.65 mole, 333 ml.) was added under nitrogen to a magnetically stirred solution of freshly distilled cyclopentadiene (60 ml., 0.68 mole) in dry tetrahydrofuran (THF) (550 ml.) with ice bath cooling. To this resulting white suspension ethyl 7-bromoheptanoate (120 g., 0.54 mole) was added dropwise over a period of 1/2 hour. The mixture was allowed to warm to room temperature and stirred for 3 hours. The resulting clear solution was poured into water and extracted with ether (3 l). The extract was washed twice with water, once with saturated brine, dried (MgSO4) and evaporated at room temperature. This process gave almost pure 2-carboethoxyhexyl-2-cyclopentene-1,4-diene (I).

Provenance & Evidence