Additions and corrections

Earlier described compounds 2b,c as semihydrates of 2,5-cyclohexadien-4-one-spiro-3’-(2’-ethoxycarbonylmethyl-5’,5’-dimethyl-l’pyrroline) ( 2c) and as 2,5-cyclohexadien-4-one-spiro-3’-(2’-phenyl-5’,5’-dimethyl-l’-pyrroline) ( 2b), after recording 13C NMR and mass spectra, were found to be ethyl N-[l...

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Published in:Mendeleev communications 1999, Vol.9 (4), p.170-170
Main Authors: Glushkov, Vladimir A., Shklyaev, Yurii V., Sokol, Valentina I., Sergienko, Vladimir S., Davidov, Victor V.
Format: Article
Language:English
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Summary:Earlier described compounds 2b,c as semihydrates of 2,5-cyclohexadien-4-one-spiro-3’-(2’-ethoxycarbonylmethyl-5’,5’-dimethyl-l’pyrroline) ( 2c) and as 2,5-cyclohexadien-4-one-spiro-3’-(2’-phenyl-5’,5’-dimethyl-l’-pyrroline) ( 2b), after recording 13C NMR and mass spectra, were found to be ethyl N-[l-( p-hydroxyphenyl)-2-methylpropan-2-yl]malonamate (here 1a) and N-[l-( p-hydroxyphenyl)-2-methylpropan-2-yl]benzamide (here 1b). Named above spiro-compounds 2b,c are formed in the described conditions and can be detected by TLC; however, they are easily converted to amides (here 1a,b) during isolation as a result of hydrolysis in acidic media.
ISSN:0959-9436
DOI:10.1070/MC1999v009n04ABEH001238