Abstract: New lamellarins are provided of the general formula III wherein X is selected from the group consisting of N, O and S; wherein R1, R2, R3, R4, R5, R6, R7, R8 and R9 are each independently selected from the group consisting of H, OH, OR?, SH, SR?, SO2R?, NHR?, N(R?)2, N?R?, NHCOR?, N(COR?)2, NHS02R?, N02, PO(R?2, P02R?, C(=0)H, C(=0)R?, C02H, C02R?, OPO(R?)2, OP02R?, OC(=0)H, OC(=0)R?, N?C(R?)2, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C1-C12 haloalkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl and substituted or unsubstituted heteroaromatic; wherein each of the R? groups is independently selected from the group consisting of H, OH, N02, NH2, SH, CN, halogen, =0, C(=0)H, C(?O)CH3, C02H, C(=0)R?, substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C2-C18 alkenyl, substituted or unsubstituted C2-C18 alkynyl, substituted or unsubstituted aryl, s

Abstract: Derivatives of ecteinascidin 736 of general formula (I) wherein the groups R1, R2, R3, R4 and R5 are each independently selected from the group consisting of H, OH, OR?, SH, SR?, SOR?, SO2R?, C(?O)R?, C(?O)OR?, NO2, NH2, NHR?, N(R?)2, NHC(O)R?, CN, halogen, ?O, substituted or unsubstituted C1-C25 alkyl, substituted or unsubstituted C2-C18 alkenyl, substituted or unsubstituted C2-C18 alkynyl, substituted or unsubstituted arly, substituted or unsubstituted heterocyclic; wherein X is independently selected of OR?, CN, (?O), or H; wherein each of the R? groups is independently selected from the group consisting of H, OH, NO2, NH2, SH, CN, halogen, ?O, C(?O)H, C(?O)CH3, CO2H, substituted or unsubstituted C1-C25 alkyl, substituted or unsubstituted C1-C18 alkenyl, substituted or unsubstituted C2-C18 alkynyl, substituted or unsubstituted aryl; wherein m is 0, 1 or 2; and wherein n is 0, 1, 2, 3, or 4, and their use as antitumoral agent.

Abstract: Processes are provided for preparing compounds with a fused ring structure of formula (XIV). Such products include ecteinascidins and have a spiroamine-1,4-bridge. The process involving forming a 1,4 bridge using a 1-labile, 10-hydroxy, 18-protected hydroxyl, di-6,8-en-5-one fused ring compound. After formation of the 1,4 brige, C-18 protection is removed before spiroamine introduction.

Abstract: Derivatives of Et-743 or Et-770 or Et-729 are provided. The derivatives are of the general formula (Ia) wherein the substituent groups take various permitted meanings.

Abstract: Antitumor compounds have the five membered fused ring ecteinascidin structure of the formula (XIV). The present compounds lack a 1,4-bridging group as found in the ecteinascidins. They have at the C-1 position a substituent selected from an optionally protected or derivatised aminomethylene group or an optionally protected or derivatised hydroxymethylene group.

Abstract: The invention provides aplidine derivatives and synthetic methods.

Abstract: New spisulosine derivatives of use in treating tumors are of the formula (I) wherein: each X is the same or different, and represents H, OH, OR′, SH, SR′, SOR′, SO2R′, NO2, NH2, NHR′, N(R′)2, CN, halogen, C(═O)H, C(═O)CH3, CO2H, CO2CH3, substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C2-C18 alkenyl, substituted or unsubstituted C2-C18 alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaromatic, or two groups X may together form ═O; Y is NR1, OR1, PR1, SR1, or halogen, wherein the number of substituents R1 is selected to suit the valency and each R1 is independently selected of H, OH, C(═O)R′, P(═O)R′R″, substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C2-C18 alkenyl, substituted or unsubstituted C2-C18 alkynyl, substituted or unsubstituted aryl, and wherein the dotted line indicates an optional double bond; each Z is the same different, and represents H, OH,

Abstract: Antitumour compounds have the five membered fused ring ecteinascidin structure of the formula (XIV). The present compounds lack a 1,4-bridging group as found in the ecteinascidins. They have at the C-1 position a substituent selected from an optionally protected or derivatised aminomethylene group or an optionally protected or derivatised hydroxymethylene group.

Abstract: Processes are provided for preparing compounds with a fused ring structure of formula (XIV). Such products include ecteinascidins and have a spiroamine-1,4-bridge. The process involving forming a 1,4 bridge using a 1-labile, 10-hydroxy, 18-protected hydroxy, di-6,8-en-5-one fused ring compound. After formation of the 1,4 bridge, C-18 protection is removed before spiroamine introduction.