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Chem., 41, 2835Chem., 41, (1976.2-Furylmethyltrimethylamrnonium iodide was caused to react with cyanide, under special conditions, to yield a mixture of 2 (27%) and 3 (5%): E. L. Eliel and P. E. Peckham.

Die Pyrenessigsäure (I) wird zum Keton (II) cyclisiert, das über den entsprechenden Alkohol in den gesuchten Kohlenwasserstoff (III) umgewandelt wird.

The photodimer 5,6,6aa,6bfl,7,8,12bfl, 12ca-octahydrodibenzo[a,i]biphenylene is obtained as the major product from the benzophenone-sensitized photolysis of 1,2-dihydronaphthalene. The preparation, purification, and spectral data of the compound are described. Crystals of the compound are orthorhombic, space group Pbca. The cell dimensions are: a = 14.638 (5), b = 11.09 (1), c = 17.536 (8) A (at -160°C).The structure was determined by direct methods and refined with least-squares calculations based on 2704 data collected at -160°C. The final R value is 0.047. The molecule has approximately twofold symmetry. The central cyclobutane ring is planar and has one elongated bond of 1.579 (2) A.

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