Patent ID: 6956031

Claim:
A 19-Nor-17α-pregna-1,3,5(10)-triene with a 21,16α-lactone ring of formula (II) in which R 3 represents a hydrogen atom, a C 1-4 -alkyl, C 2-6 -acyl or tri(C 1-4 -alkyl)silyl group or R 18 SO 2 —, R 18 represents R 19 R 20 N—, R 19 and R 20 independently of one another, are a hydrogen atom, a C 1-5 -alkyl radical, or C(O)R 21 , R 21 represents a straight-chain or branched hydrocarbon radical with up to 6 carbon atoms, a C 3-7 -cycloalkyl radical, an aryl radical, an aralkyl radical or an alkylaryl radical, R 11 represents a radical of formula —B-Z-R 22 , B stands for a straight-chain or branched-chain alkylene with 4 to 9 carbon atoms, Z stands for —NR 23 , R 23 stands for a C 1 -C 3 -alkyl group, R 22 stands for a hydrogen atom, a straight-chain or branched-chain alkyl, alkenyl or alkinyl group with 3 to 11 carbon atoms or for -D-C n F 2n+1 , D is a straight-chain or branched-chain alkylene, alkenylene or alkinylene group with 3 to 11 carbon atoms, n is an integer of 1 to 5, and R 13 stands for a methyl or ethyl group.