T3P® (propylphosphonic anhydride) mediated conversion of carboxylic acids into acid azides and one-pot synthesis of ureidopeptides
作者:Basavaprabhu、N. Narendra、Ravi S. Lamani、Vommina V. Sureshbabu
DOI:10.1016/j.tetlet.2010.04.002
日期:2010.6
A general, mild, efficient, and environmentally benign protocol, which makes use of T3P® as an acid activating agent for the direct synthesis of acid azides from carboxylic acids is described. Further, the protocol is employed for the one-potsynthesis of α-ureidopeptides starting from N-protected α-amino acids.
A conversion of o-phenylenediamines into benzotriazoles was achieved at room temperature using tert-butyl nitrite. The optimized conditions are also well suited for the transformation of sulfonyl and acyl hydrazines into corresponding azides. This protocol does not require any catalyst or acidic medium. The desired products were obtained in excellent yields in a short span of time.
Direct and facile synthesis of acyl azides from carboxylic acids using the trichloroisocyanuric acid–triphenylphosphine system
作者:Batool Akhlaghinia、Hamed Rouhi-Saadabad
DOI:10.1139/cjc-2011-0493
日期:2013.3
A mild, efficient, and practical method for the one-step synthesis of acyl azides from carboxylic acids using a safe and inexpensive mixed reagent, trichloroisocyanuric acid–triphenylphosphine, is described.