(R)-[5-cyano-7-hydroxy-8-methyl-1-propyl-1,3,4,9-tetrahydro-pyrano.[3,4-b]indol-1-yl]-acetic acid methyl ester 、
2-(氯甲基)-5-甲基-1,3,4-噻二唑 在
potassium iodide
potassium carbonate 作用下,
以
N-甲基吡咯烷酮 为溶剂,
反应 24.0h,
以63%的产率得到(R)-[5-cyano-8-methyl-7-(5-methyl-[1,3,4]thiadiazol-2-ylmethoxy)-1-propyl-1,3,4,9-tetrahydro-pyrano[3,4-b]indol-1-yl]-acetic acid methyl ester