5307-99-3

clear brown liquid

Dichloracetyl chloride and cyclopentadiene in pentane heated to reflux, was added dropwise triethylamine in pentane , and a lot of white triethylamine hydrochloride was produced. After reflux for 2 hours, water was added to dissolve the triethylamine hydrochloride. The reaction mixture was extracted with pentane. The combined extracts were filtered and dried over anhydrous Na₂SO₄, and concentrated in vacuo to give brownish black oil. Fraction of reduced pressure distillation  was collected to give product as a colorless oil.

Dichloracetyl chloride and cyclopentadiene in pentane heated to reflux, was added dropwise triethylamine in pentane , and a lot of white triethylamine hydrochloride was produced. After reflux for 2 hours, water was added to dissolve the triethylamine hydrochloride. The reaction mixture was extracted with pentane. The combined extracts were filtered and dried over anhydrous Na₂SO₄, and concentrated in vacuo to give brownish black oil. Fraction of reduced pressure distillation  was collected to give product as a colorless oil.