Practical, laboratory-scale synthesis of N<sup>in</sup>
-formyl tryptophan hydrobromide
作者:Alexey N. Chulin、Igor L. Rodionov
DOI:10.1002/psc.2613
日期:2014.4
inorganic and organoelement halides was evaluated as acidic promoters of direct Nin‐formylation of tryptophan. In addition to Me3SiBr, the less expensive PBr3 was found to be highly efficient and was selected for further optimization. A convenient and reproducible synthetic procedure for Nin‐formyltryptophan hydrobromide developed in this way was scaled to 150 mmol and successfully extended to some