A novel process for the production of Fmoc (9H-fluoren-9-ylmethoxycarbonyl)-based compounds is provided, wherein a protecting group for the 9-hydroxymethyl group of the fluorene ring system is utilized. These compounds are useful for the modification of protein and peptide drugs.本發明提供一種製備以Fmoc(9H-茀-9-基甲氧基羰基)為主之化合物之新穎方法,其中利用用於茀環系統之9-羥基甲基之保護基。該等化合物適用於修飾蛋白質及肽藥物。