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Photolysis of 3β-acetoxylanostan-11 β-yl nitrite affords 3β-acetoxy-19-hydroxyiminolanostan-11β-ol. From this compound 19-nitrilo- and 19-amino-derivatives have been prepared. The method of forming the 9β,10β-cyclopropane ring by deamination of 19-aminolanost-9(11)-en-3β-ol, as previously reported, does not lead to cyclopropane derivatives.
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BARTON et al. (1969) studied this question.
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