FIELD: organic chemistry, steroids. SUBSTANCE: invention relates to derivatives of pregnane 17,20-epoxides of the general formula (I): 
where R is = O, β--OH; A and B are residues: 
and K is O or a group: 
or 
where n = 2,3; R1 - ether or ester residue and wavy lines mean a mixture of isomers. Synthesized compounds can be used as semiproducts for synthesis of biologically active substances that can be used in medicine. EFFECT: improved method of synthesis. 11 cl, 6 ex
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