• More reactive reagent than Chlorotriphenylmethane, A11799 for the preparation of trityl esters: J. Org. Chem.,27, 3595 (1962). One-pot conversion of amino acids to their N-trityl derivatives involves N,O-ditritylation and selective methanolysis of the trityl ester: Synthesis, 198 (1989). See also Appendix 6.