反应详情

A solution of 7.9 g. of 1-iodo-1-octen-3-one in 30 ml. of tetrahydrofuran is added dropwise over 10 minutes to an ice-cooled solution of ethynyl magnesium bromide (prepared from 21 ml. of 3M methyl magnesium bromide in ether and excess acetylene) in 170 ml. of tetrahydrofuran. After stirring at 0° for 1 hour under nitrogen, the mixture is added to ammonium chloride solution and extracted with ether. The extract is washed, dried, evaporated and the residue distilled to obtain the title product, 5.05 g., b.p. 55°-65°/.005 mm.

1. extractionextracted with ether
2. washThe extract is washed
3. customdried
4. customevaporated
5. distillationthe residue distilled