Photochemie in der Vitamin D-Reihe. II.
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K. Pfoertner
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Article
📅
1972
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John Wiley and Sons
🌐
German
⚖ 614 KB
## Abstract In addition to the known ring opening at shorter wavelengths it was found that ring opening in Δ^5,7^‐steroids occurs also at λ > 300 nm. Ring closure of the corresponding __seco__‐ steroids in this region was confirmed. The existence of three rotational isomers with respect to the 5,6‐