82471-19-0Relevant academic research and scientific papers
Crystal structures of an α-cyclobutyl tricyclic enone and its p-bromobenzoate
Pauptit, Richard A.,Trotter, James
, p. 63 - 68 (2007/10/02)
Crystal of the enone, C22H32O3, are monoclinic, P21/n, a=15.722(4), b=7.463(2), c=17.213(1) Angstroem, β=104.67(1) deg, Z=4.The structure was solved by direct methods and was refined to R=0.040 for 656 reflections with I/?(I)>=3.0.Crystal of the p-bromobenzoate derivative are triclinic, P1, a=11.023(1), b=11.877(1), c=10.900(1) Angstroem, α=90.461(8), β=111.57(1), γ=80.51(1) deg, Z=2.The structure was solved by Patterson and Fourier methods and refined to R=0.032 for 2715 reflections with I/?(I)>=3.0.The X-ray studies were carried out in order to investigate a possible highly strained trans-fused 4- and 5-membered ring system in a photoadduct obtained as an intermediate in the projected syntheses of stemodin and aphidicolin.The ring system was, however, cis-fused.
