An efficient NIS-promoted guanylation reaction is described. This procedure allows the guanylation of primary and secondary amines through the reaction with di-Boc-thiourea and di-Boc-S-methylisothiourea, respectively. We demonstrated that the use of NIS compares favorably with existing methods and is an attractive alternative to heavy metal or Mukayama's reagent activation. (C) 2009 Elsevier Ltd. All rights reserved.
A Mild and Inexpensive Procedure for the Synthesis of N,N′-Di-Boc-Protected Guanidines
作者:Andrea Porcheddu、Lidia De Luca、Giampaolo Giacomelli
DOI:10.1055/s-0029-1218365
日期:2009.12
A novel and efficient synthetic procedure for converting a diverse set of amines to N,N′ -di-Boc-protected guanidines is described. The methodology comprises the use of cyanuricchloride (TCT) as activating reagent for di-Boc-thiourea. The employ of inexpensive TCT instead of classical HgCl 2 eliminates the environmental hazard of heavy-metal waste without appreciable loss of yield or reactivity. This
An efficient NIS-promoted guanylation reaction is described. This procedure allows the guanylation of primary and secondary amines through the reaction with di-Boc-thiourea and di-Boc-S-methylisothiourea, respectively. We demonstrated that the use of NIS compares favorably with existing methods and is an attractive alternative to heavy metal or Mukayama's reagent activation. (C) 2009 Elsevier Ltd. All rights reserved.