23010-53-9Relevant articles and documents
THE PREPARATION AND REACTIONS OF MIXED ANHYDRIDES OF N-ALKOXYCARBONYLAMINO ACIDS
Chen, Francis M. F.,Benoiton, N. Leo
, p. 619 - 625 (2007/10/02)
Pure mixed anhydrides R1OCO-Xxx-O-COOR2 (Xxx=NHCHRCO) have been obtained by reaction of N-alkoxycarbonylamino acids R1OCO-Xxx-OH with alkyl chloroformate R2OCOCl (R2=methyl, ethyl, isobutyl, menthyl)
Mixed Anhydrides in Peptide Synthesis. Reduction of Urethane Formation and Racemization Using N-Methylpiperidine as the Tertiary Amine Base
Chen, Francis M. F.,Steinauer, Rene,Benoiton, N. Leo
, p. 2939 - 2941 (2007/10/02)
The side reactions of urethane formation and racemization accompanying couplings by the mixed anhydride method are reduced when N-methylpiperidine is used as base, the best results being achieved in dichloromethane.