abstract |
A manufacturing process of a compound represented by the formula (7): in which R3 represents a C1-C6 alkyl group, and R4 and R5 represent, independently from each other, a hydrogen atom, a C1-C6 alkyl group or a group phenyl, or R4 and R5 together form a tetramethylene group, a pentamethylene group or an oxo group, comprising: reacting a compound represented by the formula (4): in which R3 represents a C1-C6 alkyl group, with a compound represented by the formula (5): in which R4 and R5 independently represent each other a hydrogen atom, a C1-C6 alkyl group or a phenyl group, or R4 and R5 together form a tetramethylene group, a pentamethylene group or a group oxo, and R6 represents a C1-C6 alkyl group, or with a compound represented by the formula (6): in which R4 and R5 represent, independently from each other, a hydrogen atom, a C1-C6 alkyl group or a phenyl group , or R4 and R5 together form a tetramethylene group or a pentamethylene group, with the exception that R4 and R5 of the compound (7) do not together form an oxo group when the compound (6) is used. |