Beta-phosphonyl-enamine derivative and preparation method therefor

A method for preparing a β-phosphonoenamine derivative which comprises the following steps:

• dissolving an enamine derivative, an organic phosphine compound, manganese acetate, and potassium carbonate in a solvent and reacting at room temperature to obtain the β-phosphonoenamine derivative;
• wherein the enamine derivative has the following structure:
• wherein R1 and R2 are one of the followings:
• (1) R1 is selected from the group consisting of hydrogen, methyl, methoxy, fluorine, chlorine, bromine, and trifluoromethyl, and R2 is hydrogen;
• or
• (2) R2 is selected from the group consisting of methyl, methoxy, fluorine, chlorine, and bromine, and R1 is hydrogen;
• wherein the organic phosphine compound has the following structure:
• and
• wherein R is selected from the group consisting of methoxy, ethoxy, isopropoxy, tert-butoxy, and phenyl;
• wherein the β-phosphonoenamine derivative has the following structure:
• in which R1, R2 and R are as defined above.