Acetic Anhydride → 1-Methyl-4-oxo-5-(prop-2-yn-1-yl)cyclopent-2-en-1-yl acetate

Beteiligte Stoffe

Reaktionsschritte

Into the same flask as used in Example 1, 3-hydroxy-2-propargyl-3-methyl-4-cyclopentenone (30 g) and acetic anhydride (70 g) were charged, and the resultant mixture was stirred at 100° to 120° C. for 3 hours. After completion of the reaction, the reaction mixture was subjected to the same work-up as in Example 11, followed by purification to give 36.4 g of dl-3-acetoxy-2-propargyl-3-methyl-4-cyclopentenone. Yield, 95%. B.P., 82°-86° C./0.2-0.3 mmHg.

Herkunft & Nachweise