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Raman spectra and conformations of dibenzo- and dicyclohexano-18-crown-6

✍ Scribed by Hideo Takeuchi; Takaki Arai; Issei Harada

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
601 KB
Volume
223
Category
Article
ISSN
0022-2860

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Alkylation Studies with Isopropylidene M
Alkylation Studies with Isopropylidene Malonate under PTC and Dibenzo-(18)-Crown-6
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lsopropylidene malonate (2,2-dimethyl-4,6-dioxo-l,3-dioxane, Meldrum's acid) has a high acidity (pK1 = 4.97), a rigid cyclic structure and can undergo easy hydrolysis. It has become an attractive reagent in or anic synthesis.' For example, it can readily undergo Knoevena el conden~ation?'~ Michael a