Abstract: The invention relates to a method for preparing a compound (I) or one of the salts thereof, and the uses of said method, R1OOC—C(?X)—CHR2R3(I), wherein X is selected among O; N—R?, wherein R? is H or a C1-C6 alkyl; and N—OR? wherein R? is H, or a C1-C6 alkyl or an alkylaryl; R1 is H or a C1-C6 alkyl group; R2 is H, a C1-C6 alkyl, or an alkylaryl; and R3 is CH2SR4 or CH2SeR4, where R4 is H or a C1-C6 alkyl from a compound (II), or one of the salts thereof, R1OOC—C(?X)—CHR2R5 and R5 is H or COOR6, where R6 is H or a C1-C6 alkyl, said method being carried out in the presence of a compound (III) CH2(Y)(Z).

Abstract: The invention relates to compounds of formulae (Ia), (Ib) or (Ic) wherein, A1 and A2, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl, (C1-C6) alkyl-ORa, (C1-C6) alkyl-SRa, (C1-C6) alkyl-NRaRb, ORa, SRa, NRaRb, or CORa; A3 is H, OH or form a carbonyl with A4; A4 is H, OH or form a carbonyl with A3; A5 is H, CRaRbOH, F, OH or forms a double bond with X in the case where X is CH; A6 is H or F; X is CH2, CHF, CF2, CHOH, O, S, NRa or a simple bond, or X is CH in the case where A5 forms with X a double bond; Y is P(O)(ORa)(ORb) or P(O)(ORa)(NRaRb); V is O or S; A7 is H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl or (C1-C6) alkyl-ORa; A8 is OH or H, Ra and Rb, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C1-C6) alkyl-OH or (C1-C6) alkyl-O—(C1-C6) alkyl; and their addition salts thereof with acids and bases, their preparation and their use in the antibacterial prevention and therapy, used alone or in association with

Abstract: The invention relates to compounds of formulae (Ia), (Ib) or (Ic) wherein, A1 and A2, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl, (C1-C6) alkyl-ORa, (C1-C6) alkyl-SRa, (C1-C6) alkyl-NRaRb, ORa, SRa, NRaRb, or CORa; A3 is H, OH or form a carbonyl with A4; A4 is H, OH or form a carbonyl with A3; A5 is H, CRaRbOH, F, OH or forms a double bond with X in the case where X is CH; A6 is H or F; X is CH2, CHF, CF2, CHOH, O, S, NRa or a simple bond, or X is CH in the case where A5 forms with X a double bond; Y is P(O)(ORa)(ORb) or P(O)(ORa)(NRaRb); V is O or S; A7 is H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl or (C1-C6) alkyl-ORa; A8 is OH or H, Ra and Rb, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C1-C6) alkyl-OH or (C1-C6) alkyl-O—(C1-C6) alkyl; and their addition salts thereof with acids and bases, their preparation and their use in the antibacterial prevention and therapy, used alone or in association with

Abstract: The invention relates to a method for preparing 2-hydroxybutyrolactone (2HBL) from a compound or its salt or its oligomers, said compound fitting formula (I) CH3—S—CH2CH2CR1R2R3 Wherein R1 represents H R2 represents a group selected from OH; OR4 and OCOR4 wherein R4 represents a group selected from linear, cyclic, alicyclic or branches alkyl groups having from 1 to 10 carbon atoms, and aryl groups having from 6 to 10 carbon atoms, optionally substituted with substituent(s) selected from linear or branched alkyl groups having from 1 to 10 carbon atoms, halogens and hydroxyl, amino, nitro and alkoxy groups having from 1 to 10 carbon atoms; and OSiRR?R? wherein R, R? and R? are selected independently of each other from linear, cyclic, alicyclic or branched alkyl groups having from 1 to 10 carbon atoms, aryl groups having from 6 to 10 carbon atoms, optionally substituted with substituent(s) selected from linear or branched alkyl groups having from 1 to 10 carbon atoms, or R1 and R2 represent together ?O, R3 r

Abstract: The invention relates to a method for preparing 2-hydroxybutyrolactone (2HBL) from a compound or its salt or its oligomers, said compound fitting formula (I) CH3—S—CH2CH2CR1R2R3 Wherein R1 represents H R2 represents a group selected from OH; OR4 and OCOR4 wherein R4 represents a group selected from linear, cyclic, alicyclic or branches alkyl groups having from 1 to 10 carbon atoms, and aryl groups having from 6 to 10 carbon atoms, optionally substituted with substituent(s) selected from linear or branched alkyl groups having from 1 to 10 carbon atoms, halogens and hydroxyl, amino, nitro and alkoxy groups having from 1 to 10 carbon atoms; and OSiRR?R? wherein R, R? and R? are selected independently of each other from linear, cyclic, alicyclic or branched alkyl groups having from 1 to 10 carbon atoms, aryl groups having from 6 to 10 carbon atoms, optionally substituted with substituent(s) selected from linear or branched alkyl groups having from 1 to 10 carbon atoms, or R1 and R2 represent together ?O, R3

Abstract: A method for preparing 2-(n-butyl)-5-nitrobenzofuran from 1-halo-4-nitrobenzene, characterized in that 1-hexen-3-ol is reacted, and then the product is subject to a Claisen rearrangement, followed by catalytic intramolecular cyclization.