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Chlorination of 2,3,6-trialkyl-5,8-dihydroxy-1,4-naphthoquinones with HCl-MnO2in acetic acid. effective transformation of 2,3,6-trialkyl-2,3,7-trichloro-1,2,3,4-tetrahydronaphthalene-1,4-diones into 7-chloro-2,3,6-trialkyl-5,8-dihydroxy-1,4-naphthoquinones

✍ Scribed by N. S. Polonik; S. G. Polonik; V. A. Denisenko; O. P. Moiseenko; V. F. Anufriev

Book ID
111465760
Publisher
SP MAIK Nauka/Interperiodica
Year
2011
Tongue
English
Weight
181 KB
Volume
47
Category
Article
ISSN
1070-4280

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The title compound, C 18 H 20 ClNO 2 , has been synthesized by the reaction of 4-chlorobenzaldehyde, Meldrum's acid, dimedone and CH 3 NH 3 Cl(NaOAc) in ethanol under microwave irradiation. The pyridone ring adopts a screw-boat conformation and the cyclohexenone ring an envelope conformation.