sodium hydroxide; 5,11,17,23-tetramethoxy-25,26,27,28-tetrakis(trimethylammoniomethyl)calixlt;4gt;arene tetrachloride in water
T=20°C; Michael addition; 0.2 h;
El-Sadany, S K; Sharaf, S M; Darwish, A I; Youssef, A A
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1991 , vol. 30, # 6 p. 567 - 573
Avery bei Upson; Maxwell; Parmelee
Journal of the American Chemical Society, 1930 , vol. 52, p. 1975
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Kohler, Allen
Journal of the American Chemical Society, 1924 , vol. 46, p. 1526
