1: p-toluenesulfonic aci / acetone / 24 h / Ambient temperature
2: 98.2 percent / pyridine / 0.75 h / 0 °C
3: conc. H2SO4 / dioxane; H2O / 15 h / 70 - 80 °C
View Scheme
参考文献
Kim, Hea O.; Ahn, Soon K.; Alves, Antonio J.; Beach, J. Warren; Jeong, Lak S.; et al
Journal of Medicinal Chemistry, 1992 , vol. 35, # 11 p. 1987 - 1995
1: 98.2 percent / pyridine / 0.75 h / 0 °C
2: conc. H2SO4 / dioxane; H2O / 15 h / 70 - 80 °C
View Scheme
参考文献
Kim, Hea O.; Ahn, Soon K.; Alves, Antonio J.; Beach, J. Warren; Jeong, Lak S.; et al
Journal of Medicinal Chemistry, 1992 , vol. 35, # 11 p. 1987 - 1995