Conclusions
The regio- and stereospecific [2 + 2]-photoaddition of 1-pentyne to 16-dehydropregnenolone acetate has been used to obtain 2′-propyl-16α,17α-cyclobuteno- and cyclobutanoprogesterones.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No.5, pp. 1184–1187, May, 1986.
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Kamernitskii, A.V., Ignatov, V.N., Levina, I.S. et al. Transformed steroids Communication 152. Photocycloaddition of 1-pentyne to 16-dehydropregnenolone acetate. Russ Chem Bull 35, 1075–1078 (1986). https://doi.org/10.1007/BF00955385
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DOI: https://doi.org/10.1007/BF00955385