Abstract Metallation of methoxypropadiene, CH 2= C= CHOCH 3, with butyllithium in ether, followed by reaction with carbonyl compounds, R 1 R 2 C= O (R 1 and R 2= H or alkyl or R 1 R 2 C= cyclohexyl), affords carbinols, CH 2= C= C [CR 1 R 2 (OH)] OCH 3, in excellent yields. Acid-catalysed hydrolysis of these carbinols gives nearly quantitative yields of unsaturated ketols,
