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Of biological importance, vitamin D and its prohormone (provitamin D) are heavily involved in calcium and iron absorption by the gut. Although photochemistry in the vitamin D field has been studied widely, studies have been limited to photoreactions in solution and glassy media. The motivation for this study of the solid-state photochemistry of provitamin D is the possibility that it may lead to a “green” method of synthesizing vitamin D and its valuable derivatives while avoiding the use of photoreaction solvents. Irradiation of provitamin D in the solid state was shown to give a single product. This product was synthesized, subsequently isolated, and spectroscopically characterized. It was shown to differ from the other known primary and secondary photoproducts provitamin, namely previtamin D and its major photoproducts: lumisterol and tachysterol. Its NMR spectrum was also compared to those of the acid rearrangement products isotachysterol and isoprevitamin D.
Kallumkal, G. H. (2017). The Solid-State Photochemistry of Provitamin D. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1493400732