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With potassium phosphate; copper(l) iodide; (-)-(1R,2R)-diaminocyclohexane; In N,N-dimethyl acetamide; at 175℃;Inert atmosphere;
2.1Weigh 2.03 g of pyridinium, 4.18 g of TM-2, 1.14 g of CuI, 1.36 g of cyclohexanediamine,7.63g K3PO4 was dissolved in 100mL of DMAC. After charging and discharging nitrogen for 3 times, set the temperature to 175 C.Turn on the reaction;2.2After the reaction was completed, after cooling to room temperature, the cake was plated with silica gel and diatomaceous earth, and the reaction mixture was filtered.Concentrating the reaction solution to give a brown solid;2.3 Add 7g silica gel powder to mix and sample, and pass the column to solid 3.1g, yield 60%, HPLC=99%;