Cis/trans conversion of potassium derivatives of 2- and 4-nitrostilbenes
β Scribed by Zori V. Todres
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 416 KB
- Volume
- 441
- Category
- Article
- ISSN
- 0022-328X
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π SIMILAR VOLUMES
In a previous Letter 111 the N-O acyl migration of cis-and trans-2--aminomethylcyclohexanol and cis-and trans-2-hydroxymetbylcyclohexylamine derivatives was reported. The present coamnznication deals with the stereospecific synthesis of the analogous cyclopentane derivatives, as well as the examinat
Β±)-cis-or (Β±)-trans-4-Methylpipecolic acid and ester derivatives can be obtained directly by addition of electrophiles to a-lithiated N-Boc 4-methylpiperidine.
Equilibrations of the stereoisomeric cis -and trans -2 -t-butyl-4 -hydroxycyclo-hexanones (I and If), catalyzed by hydrogen chloride in benzene solution (Table I), show 'AH", -130 \* 30 Cal/mole; i?S", of log K vs. l/T. -0.13 \* 0.1 eu; from a graph Estimated absolute error limits are given.