sodium carbonate in 1,4-dioxane T=20°C;

1: 3-(3,4-dihydroxyphenyl)-L-alanine With sodium carbonate in 1,4-dioxane; water 0.166667 h; 2: (9H-Fluoren-9-yl)-methyl chloroformate in 1,4-dioxane; water 29 h;