Cyclisierungen am 2‐Cyclohexyliden‐cyclohexanon. II. Mitt.): Synthese von 1,3‐Trimethylen‐4,5‐tetramethylen‐2,6,7‐trioxocyclohepten‐(3) und von Dodekahydrocarbazol

The structures of certain base-catalyzed condensation products

“…260-265° (dec.) ; reported m.p. 267-270° (17). The assigned structure of the base-catalyzed condensa tion product of eyelohexenylcyclohexanone and diethyl oxalate has been shown corrected.…”

“…Mue1ear magnetic resonance spectra Nuclear magnetic resonance spectra (PART II -THE STRUCTURE OF THE BTHYLOXALATE-CYC LOEEX-ENYLC YCLOHEXAKOEE COltDENSATION PRODUCT INTRODUCTION The structure of the product of the base-catalyzed condensation of cyclohexenylcyclohexanone and ethyl oxalate is to be determined. (to) HISTORICAL Jager erfc al (17). reported that a condensation of cyclohexylidenecyclohexanone XLIII with ethyl oxalate in the pre sence of sodium gave a yellow product whose carbonhydrogen analysis showed it to be derived from one mole each of XLIII and ethyl oxalate minus the elements of two moles of ethenol.The reaction was carried out in ether, whence the sodium salt had precipitated.…”

The structures of certain base-catalyzed condensation products

“…On reaction with tryptamine, followed by (to) HISTORICAL Jager erfc al. (17) reported that a condensation of cyclohexylidenecyclohexanone XLIII with ethyl oxalate in the pre sence of sodium gave a yellow product whose carbonhydrogen analysis showed it to be derived from one mole each of XLIII and ethyl oxalate minus the elements of two moles of ethenol.…”