p-Toluenesulfonic acid → HCID 54481677, compound

Participants

Reaction Conditions

Reaction Steps

103.3 g of p-methoxy-propiophenone diethyl ketal are treated with 1.1 g of p-toluenesulphonic acid and heated in a distillation apparatus to 140° C. (oil bath temperature). In so doing, the ethanol formed is distilled off continuously at atmospheric pressure. 20 g of ethanol are distilled off within 31/2 hours. Subsequently, the mixture remaining is distilled in a high vacuum over a 15 cm column. There are obtained 62.2 g of 1-(p-methoxyphenyl)-1-ethoxy-1-propene (yield: 74.8% of theory). B.p.=78°-79° C. 0.3 mmHg; nD20 =1.5315: d420 =1.0175.

Provenance & Evidence