Process for producing condensed polycyclic alkaloids by ring closure of azomethine ylide, novel compounds by the process and use of the compounds as chemotherapeutic agents

摘要

The invention provides compounds of general Formula (I) wherein, A is a cyclic group being an optionally substituted aryl group or an aromatic heterocyclic group; or A is a cyclic group R A1 R A2 C-CR A3 R A4 wherein R A2 and R A3 , together with the carbon atoms to which they are attached form an optionally substituted saturated or unsaturated carbocyclic or heterocyclic group and R A1 and R A4 are as defined below or together form a bond; or A is a non-cyclic group R A1 R A2 C-CR A3 R A4 wherein R A1 - R A4 are as defined below and R A2 and R A3 may optionally together form a bond; Z is a carbon or a heteroatom; n is selected from 0, 1, 2 or 3; and R A1-A4 , W, X and Y may be the same or different and each are selected from hydrogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally protected hydroxy, optionally substituted amino, optionally substituted alkoxy, optionally substituted alkenoxy, optionally substituted alkynoxy, optionally substituted aryl, optionally substituted heterocyclyl, carboxy, carboxy ester, carboxamido, acyl, acyloxy, mercapto, optionally substituted alkylthio, halogen, nitro, sulfate, phosphate and cyano, or W and X, together with the nitrogen and carbon atoms to which they are attached, form a saturated or unsaturated nitrogen containing heterocyclic group which may be optionally substituted or optionally fused to a saturated or unsaturated carbocyclic group, aryl group or heterocyclic group; or pharmaceutically acceptable derivatives and salts, racemates, isomers and/or tautomers thereof; provided that the compound is not one selected from Lamellarin A-N, S-X; D, L, K, M, N-triacetate; I-acetate; G-trimethyl ether; or T, U, V, Y-20-sulphate. Such compounds are useful as chemotherapeutic agents.