| abstract |
Cyclopenta[g]quinazolines of the formula (I):— n n n n n n n n n n wherein:n A is a group OR or NR 0 R 1 wherein R 0 and R 1 are each independently hydrogen C 1-4 alkyl, C 3-4 alkenyl, C 3-4 alkynyl, C 2-4 hydroxyalkyl, C 2-4 halogenoalkyl or C 1-4 cyanoalkyl, or R 0 and R 1 together with the intermediate N form a five- or six-membered heterocyclic ring; p is an integer in the range 1 to 4; R 2 is hydrogen, C 1-4 alkyl, C 3-4 alkenyl, C 3-4 alkynyl, C 2-4 hydroxyalkyl, C 2-4 halogenoalkyl or C 1-4 cyanoalkyl; Ar 1 is phenylene, thiophenediyl, thiazolediyl, pyridinediyl or pyrimidinediyl which may optionally bear one or two substituents selected from halogeno, hydroxy, amino, nitro, cyano, trifluoromethyl, C 1-4 alkyl and C 1-4 alkoxy; and R 3 is a group of one of the following formulae: nn -A 1 -Ar 2 -A 2 -Y 1 -A 5 -CON(R)CH(Y 4 )Y 5 -A 8 -X—Ar 4 n and pharmaceutically acceptable salts or esters thereof are of therapeutic value particularly in the treatment of cancer. |