β Scribed by F. Geiss; G. Blech
No coin nor oath required. For personal study only.
The synthesis underwent the followYng intermediate steps : reaction of cyclopentanon wlith KIJCN, reduction of the cyanhydrine formed with LiAIH4 to aminol, Demjanow ring enlargement to 2-labelled cyclohexanone, reaction with 2-xenyl-magnesiumiodide, dehydratization and aromatization of the carbinol to o-terphenyt-2-I3C. Yield of pure product 16 :(, referred to KCN. The purijication was accomplished by preparative TLC on Kieselgel. The side products of the last step are : 0-xenylcyclohexan, the unknow'n hexahydrotriphenylene, p-terphenyl, o-quaterphenyl and tryphenylene. * unter Mitarbeit von Herrn A. Copet, der die rnassenspektrometrische Identifizierung unbekannter Beirnengungen besorgte.
π SIMILAR VOLUMES
Aryl-substituted cyclohexanols were obtained by reacting 1% labelled phenyllithium with 2-and 4-phenylcyclohexanone, and 2-and 4-xenyllithium with W-labelled cyclohexanone. Heated with palladium charcoal, these yielded 14C-labelled terphenyls. I,2diphenylcyclohexanol stereo-isomers were converted in
## 67, 739 [19z.r] . 6 , Hr. Prof. 0. G e r n g r o I3 hatte die Liebenswiirdigkeit, durch Bestirnmung des 6, Die Oxydation Ton I.~-l)iphenyl-benzol mit CrO, hat bereits G. S c h u l t z , Mkch-Schmelzpunktes unser Praparat mit dem seinen zu identifizieren. 9. 174, 230 [rS7 I ) , durchgefiihrt.
## Abstract Rhodiumβcatalyzed carbonylation of methanol at mild temperature and pressure has been developed for smallβ and largeβscale preparations of the carbon isotope isomers of acetic acid.