The easy synthesis of 9-hydroxy-9-(4-carboxyphenyl) xanthene 1 a new linker for the solid phase peptide synthesis of peptide amides is reported. The cleavage conditions were checked and several peptide amides were synthesized using the TentaGel-resinTM on the Milligen 9050 continuous flow peptide synthesizer.
[Arnett, Edward M.; Flowers II, Robert A.; Ludwig, Richard T.; Meekhof, Alison E.; Walek, Stuart A. Journal of Physical Organic Chemistry, 1997 , vol. 10, # 7 p. 499 - 513]