Recueil des Travaux Chimiques des Pays-Bas p. 526 - 533 (1987)
Update date:2022-08-04
Topics:
Koolstra, R. B.
Cornelisse, J.
Jacobs, H. J. C.
In analogy with the photochemistry of 7,8-didehydrocholesterol (provitamin D), irradiation of the 10-desmethyl steroid estra-5,7-diene-3β,17β-diol 17-acetate leads to a photoequilibrated mixture of steroid-5,7-dienes and 9,10-seco-5(10),6,8-trienes.In addition, a thermally unstable bicyclo<2.2.0>hexene derivative is found.From the composition of the quasi-photostationary state, the ratios of the quantum yields of the various interconversions are estimated.Differences with the photochemistry in the 10-methyl series are discussed in relation to conformational differences.
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