1: aniline With hydrogenchloride; sodium nitrite in water T=0°C; 2: 2-methyl-3-oxobutanoic acid ethyl ester With sodium acetate in ethanol; water 4 h; Cooling;
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Matiichuk; Potopnyk; Obushak
Russian Journal of Organic Chemistry, 2008 , vol. 44, # 9 p. 1352 - 1361
Nakamura, Kaoru; Miyai, Takehiko; Nagar, Ashish; Oka, Shinzaburo; Ohno, Atsuyoshi
Bulletin of the Chemical Society of Japan, 1989 , vol. 62, # 4 p. 1179 - 1187