Thiophene derivative of the following general formula I: ** Formula ** where: Y represents an aryl group, a heteroaryl group, or a benzo-1,3-dioxol group, the aryl or heteroaryl group being optionally substituted by one or more groups selected from -CN； a halogen-O atom (C1-C6 alkyl), the alkyl group being optionally substituted by one or more halogen atoms, or by a group -O (C1-C6 alkyl)； C1-C6 alkyl substituted by one or more halogen atoms, by a group -O (C1-C6 alkyl), or by a group -OH； -SO2 (C1-C6 alkyl)； -CONRaRb where Ra represents a hydrogen atom or a C1-C6 alkyl group and Rb represents a C1-C6 alkyl group； or -OH； X represents a -SO2 group or a group where it represents a bond and W represents an oxygen atom or the -NOR4 group, where R4 represents a hydrogen atom, a C1-C6 alkyl group or an aryl (C1-C6 alkyl) group , the aryl group being optionally substituted by one or more groups selected from -CN； a halogen atom； -O (C1-C60 alkyl), the aryl group being optionally substituted by one or more halogen atoms, or by a group -O (C1-C6 alkyl)； C1-C6 alkyl substituted by one or more halogen atoms, by a group -O (C1-C6 alkyl), or by a group -OH； -SO2 (C1-C6 alkyl)； -CONRa'Rb 'where Ra' represents a hydrogen atom or a C1-C6 alkyl group and Rb 'represents a C1-C6 alkyl group, or -OH, or is absent and W represents -OH； R1 represents - a C1-C6 alkyl group, the aryl group being optionally substituted by a halogen atom； - a C3-C6 cycloalkyl group； - a group (C1-C6 alkyl) O (C1-C6 alkyl)； - a group (C1-C6 alkyl) NR (C1-C6 alkyl) where R represents a hydrogen atom or a C1-C6 alkyl group, - an aryl group, the aryl group being optionally substituted by one or more groups selected from - -CN； a halogen atom； -O (C1-C60 alkyl), the aryl group being optionally substituted by one or more halogen atoms, or by a group -O (C1-C6 alkyl)； -SO2 (C1-C6 alkyl)； -CONRa "Rb" where Ra "represents a hydrogen atom or a C1-C6 alkyl group and Rb" represents a C1-C6 alkyl group； or C1-C6 alkyl),
