On the mechanism of the sensitized photooxygenation of pyrroles

Agnes D. Cuiper, Milou L. C. E. Kouwijzer, Peter D. J. Grootenhuis, Richard M. Kellogg, and Ben L. Feringa. The Journal of Organic Chemistry 1999 64 (...
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802 g of bicyclo[4.2.l]nona-2,4,7-trien-9-one. The solution was refluxed for 63 h and work up as previously described. The purified carbinol had mp 82.5-84.0': 6 ~ (CS2) ~ 5.81 ~ (m,~ 2 H, i H2 and H5), 5.67 (m. 2 H, H3 and H4), 5.12 (d ( J = 1.5 Hz), 2 H, monoene), 2.79 (dd ( J = 7.5 and 1 Hz), 2 H, bh), 2.28 (s, 1 H, OH). No signal was detected at 6 3.77 (