4-hydroxy-6-[2-(4-hydroxyphenyl)ethyl]-6-methyl-5,6-dihydro-pyran-2-one 、
toluene-4-thiosulfonic acid S-(2-tert-butyl-4-methanesulfonylamino-5-methylphenyl) ester 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以57%的产率得到(+-)-Methanesulfonamide, N-(4-((5,6-dihydro-4-hydroxy-6-(2-(4-hydroxyphenyl)ethyl)-6-methyl-2-oxo-2H-pyran-3-yl)thio)-5-(1,1-dimethylethyl)-2-methylphenyl)-