Cyclization of Dieneynes. V. 1 Hydrophenanthrenes

J. Am. Chem. Soc. , 1937, 59 (12), pp 2666–2668. DOI: 10.1021/ja01291a056. Publication Date: December 1937. ACS Legacy Archive. Cite this:J. Am. Che...
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P.S. PINKNEY, G. A. NESTY,D. E. PEARSON AND C. S. MARVEL

2666

[CONTRIBUTION FROM

THE

CHEMICAL LABORATORY O F THE UNIVERSITY OF

VOl. 59

ILLINOIS]

Cyclization of Dieneynes. V.' Hydrophenanthrenes BY P.S.PINKNEY,~ G. A. NESTY,~ D. E. PEARSON AND C. S. MARVEL Previous work indicates' that the cyclization of dieneynes to produce polynuclear compounds leads to molecules which have the trans configuration at the saturated carbon atoms common to the two fused rings. Thus the conversion of di- A'-cyclohexenylacetylene (I) to All-dodecahydrophenanthrone-9 (11) reported earlier3 would be expected to yield the trans isomer. Since it is important to have a synthetic method which will produce hydrophenanthrenes of known configuration it seemed desirable to have further proof of the cyclic nature of the ketone (11). Catalytic reduction of this ketone with hydrogen over Raney nickel4 gave an alcohol, tetradecahydrophenanthrol-9 (111) which was entirely

was partially dehydrogenated when it was heated with selenium. The dehydrogenation product was found to be identical with the tmns-as-octahydrophenanthrene (VII) which has been reported by van de Camp and Mosettig6 as being formed along with the cis isomer (VI) by the

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phosphorus pentoxide dehydration of 1,Bphenylethylcyclohexanol (V). Perlman, Davidson and Bogert' treated this alcohol (V) with sulfuric acid and obtained the spirane (VIII) as well as the mixed octahydrophenanthrenes. Oxidation of

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