Kohler et al.
Journal of the American Chemical Society, 1939 , vol. 61, p. 1057,1059
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Stoll; Rouve
Helvetica Chimica Acta, 1944 , vol. 27, p. 1570,1578, 1579, 1582
toluene-4-sulfonic acid in various solvent(s)
1.) benzene, 50 to 60 deg C, 2.) toluene, 100 deg C;
参考文献
Crandall, Jack K.; Magaha, H. Steve; Henderson, Mark A.; Widener, Rexford K.; Tharp, Gregg A.
Journal of Organic Chemistry, 1982 , vol. 47, # 27 p. 5372 - 5380