| abstract |
Compounds according to general formula 1, wherein A 1 -A 3 are selected from A 5 and A 6 where A 5 is either ═CR 13 — or ═N— and A 6 is —NR 14 —, —O— or —S—; A 4 is either a covalent bond or A 5 , provided that when A 4 is a covalent bond one of A 1 -A 3 must be A 6 and the other two must be A 5 and when A 4 is A 5 then all of A 1 -A 3 must be A 5 ; R 1 is selected from H, NHY′ and COY 2 , in which case R 2 is H, or R 1 and R2 may both be methyl or together represent ═O; R 3 , R 4 and R 5 are each independently selected from H and lower alkyl groups; R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 are each independently selected from H, lower alkyl groups, NH 2 , halogens (F, Cl and Br) O-alkyl, CH 2 NM 2 and CF 3 ; R 13 is selected from H, F, Cl Br, NO 2 , NH 2 , OH, Me, Et, OMe, NMe 2 and CF 3 ; R 14 is selected from H, methyl and ethyl; W is selected from ═CH— and ═N—; X is selected from CH 2 , O, S, SO 2 , NH and N lower alkyl; Y 1 is selected from CO-lower alkyl, CO(CH 2 ) b Y 3 , CO(CH 2 ) b COY 3 and CO(CH)NHCOY 3 , where b is 1-3; Y2 is selected from OR 15 , NR 16 R 17 and NH(CH 2 ) C COY 3 , where c is 1-3; Y 3 is selected from OR 15 and NR 16 R 17 ; R 15 is selected from H, lower alkyl and (CH 2 ) a R 16 , where a is 0-4; R 16 and R 17 are each independently selected from H, lower alkyl and (CH 2 ) a R 16 or together are —(CH 2 ) 2 -Z-(CH 2)2 —; R 18 is OH a phenyl group or an aromatic heterocycle selected from pyridyl, pyrimidinyl, pyrazinyl, furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, triazolyl, oxadiazolyl and thiadiazolyl, each of which may optionally have a lower alkyl group substituent; and Z is selected from O, CH 2 , S, SO 2 , NH and N-lower alkyl, are new. They are useful in the treatment of breast and prostate cancer, endometriosis and benign prostate hyperplasia, in the regulation of fertility, and in in vitro fertilisation. |