1: toluene-4-sulfonic acid; (+/-)-Aspartic acid; benzyl alcohol in benzene Heating; 2: (9H-Fluoren-9-yl)-methyl chloroformate With sodium hydroxide; ethanol; copper(II) sulfate in 1,4-dioxane; water pH=8; Further stages.;
参考文献
Boyer; Stanchev; Fairbanks; Davis
Chemical communications (Cambridge, England), 2001 , # 19 p. 1908 - 1909