2-(1-羟基戊基)环戊-2-烯-1-one

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 2-(1-hydroxypentyl)-2-cyclopenten-1-one (720 mg, 4.2 mmol) and pivalic acid (100 mg, 0.98 mmol) in trimethylorthoacetate (5 ml, 39.3 mmol) was heated at 115° C. for 3 hours with distillation of MeOH. The concentrated reaction mixture was bulb-to-bulb distilled to afford the title compound in 88% yield and in the form of a 66:34 (Z)/(E) mixture. The concentrated reaction mixture distilled

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of cyclopentenone (1.23 g, 15 mmol), pentanal (1.94 g, 22.5 mmol), rac-1,1′-bi-2-naphthol (429 mg, 1.5 mmol) and tributyl phosphine (606 mg, 3 mmol) in dry THF (12 ml) was stirred at 20° C. under Argon for 3 hours. The solution was then passed through a short column of SiO2 (cyclohexane/Et2O 6:4) to obtain the pure title compound in 92% yield.