摘要:
                                The reaction of 1-acyl tryptophan derivatives with chloroacetyl chloride or the reaction of 1-tosyl tryptophan derivatives with acetyl chloride provides the corresponding 6-acylation products, while acylation of the 3-oxo tryptophan derivative gives a 5-substituted product. (C) 2002 Elsevier Science Ltd. All rights reserved.