1: 87 percent / 24 h
2: d'acide para toluene sulfonique / methanol / 2 h
3: 90 percent / CH3OK / methanol / 6 h / Heating
View Scheme
参考文献
Noland; Kuryla
Journal of Organic Chemistry, 1960 , vol. 25, p. 486
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Smith
Chemistry and Industry (London, United Kingdom), 1954 , p. 1451