Abstract: A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process.

Abstract: A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process.

Abstract: The invention concerns the use of zinc derivatives of general formula (I) wherein: L1 represents a group of formula: —E14(R14)(R?14)(R?14), —E15(R15) (R?15) or —E16(R16); E is an atom of group 15; L2 and L3 independently represent a group of formula: —E14(R14)(R?14)(R?14), —E15(R15)(R?15) or —E16(R16), or together form a chain of formula —L?2—A—L?3—; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L?2 and L?3 independently represent a group of formula —E14(R14)(R?14) —E15(R15) or —E16—; E14 is an element of group 14; E15 is an element of group 15; E16 is an element of group 16; R14, R?14, R?14, R15, R?15 and R16 represent various groups, as (co) polymerisation catalysts of cyclic esters

Abstract: A compound of the formula wherein the substituents are defined as in the specification which compounds are useful in the treatment of cancer.

Abstract: A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.

Abstract: The invention relates to a method for preparing polyesters A containing several mid-chain free acid functions by ring-opening polymerisation in the presence of a chain initiator: the benzyl diester of the tartaric acid, the phenyl radical of which is optionally substituted. A: aliphatic based on cyclic esters such as lactides and glycolides.

Abstract: The use of stannylenes and germylenes of general formula (I) wherein: M represents a tin or geranium atom; L1 and L2 independently represent a group of formula: -E14(R14) (R?14) (R?14), -E15(R15) (R?15) or -E16(R16)) or together form a chain of formula -L?1-A- L?2; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L?1 and L?2, represent, independently, a group of formula: -E14(R14) (R?14)-, E15(R15)- or -E16-; E14 is an element of group 14; E15 is an element of group 15; E16 is an element of group 16; R14, R?14, R?14, R15, R?15 and R16 represent variable groups as polymerization catalysts of heterocycles.

Abstract: A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process.

Abstract: Compositions for treating cancer comprising an amount of a camptothecin with a 7-ring ?-hydroxy lactone ring of the formula wherein the substituents are defined as in the specification sufficient to treat cancer.

Abstract: The invention concerns a novel method for industrial preparation of disodium 2,2?-dithiobis(alkylsulphonates), and in particular disodium 2,2?-dithiobis(ethanesulphate) (dimesna). Said novel method is summarized by the reaction diagram (A). In diagram (A), Hal represents a halogen atom, and preferably a bromine atom; M represents a sodium or potassium atom; and n represents an integer ranging between 0 and 2.

Abstract: A compound of the formula wherein the substituents are defined as in the specification which compounds are useful in the treatment of cancer.

Abstract: Compositions for treating cancer comprising an amount of a camptothecin with a 7-ring &bgr;-hydroxy lactone ring of the formula 1

Abstract: A compound of the formula wherein the substituents are defined as in the specification which compounds are useful in the treatment of cancer.

Abstract: A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.

Abstract: A method of treating a cancer in warm-blooded animals by administration to the warm-blooded animals in need thereof a camptothecin analog a 7-ring member &bgr;-hydroxy lactone ring of the formula wherein the substituents are defined as in the specification.

Abstract: The invention relates to new compounds having an element of group 12 and having a tridentate ligand, a process for their preparation and their use in particular as a polymerization catalyst.

Abstract: A process for the preparation of a compound of the formula wherein the substituents are defined as set forth in the specification comprising reacting a compound of the formula with a 2-halo-3-quinoline-methanol of the formula to obtain a compound of the formula which is then cyclized to form the compound of Formula I.

Abstract: The invention relates to a method for preparing polyesters A containing several mid-chain free acid functions by ring-opening polymerisation in the presence of a chain initiator: the benzyl diester of the tartaric acid, the phenyl radical of which is optionally substituted. A: aliphatic based on cyclic esters such as lactides and glycolides.

Abstract: The invention concerns the use of zinc derivatives of general formula (I) wherein: L1 represents a group of formula: —E14(R′14)(R″14), —E15(R15)(R′15) or —E16(R16); E is an atom of group 15; L2 and L3 independently represent a group of formula: —E14(R14)(R′14)(R″14), —E15(R15)(R′15) or —E16(R16), or together form a chain of formula —L′2—A—L′3—; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L′2 and L′3 independently represent a group of formula —E14(R14)(R′14) —E15(R15) or —E16—; E14 is an element of group 14; E15 is an element of group 15; E16 is an element of group 16; R14, R′14, R″1, R15, R′15 and R16 represent various groups, as (co) polymerisation catalysts of cyclic esters.

Abstract: A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.