nitric acid in water stirring, heating on water bath for 3 h, standing overnight at room temp.; filtrn., washed with ethanol, ether, dried for 24 h in air at room temp.;
in water; benzene aq. ErCl3 mixed with dimethyl oxalate in benzene, at 59 to 73°C in a flask equipped with a reflux condenser;
参考文献
Watanabe, M.; Nagashima, K.
Journal of Inorganic and Nuclear Chemistry, 1971 , vol. 33, p. 3604 - 3608
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Gmelin Handbook: Sc: MVol.D5, 1.2.1.3.2, page 124 - 139
