Novel stereoselective syntheses of (2E,4E)-4-(4,4-dimethylpent-2-ynylidene)-N1,N5-dimethyl-N1,N5-bis(naphthalen-1-ylmethyl)pent-2-ene-1,5-diamine
摘要:
We report two different synthetic approaches for the stereoselective synthesis of (2E,4E)-4-(4,4-dimethylpent-2-ynylidene)-N-1,N-5-dimethyl-N-1,N-5-bis(naphthalen-1-ylmethyl)pent-2-ene-1,5-diamine important impurity-reference standard for the chemical characterization of terbinafine. The diamine 1 was obtained in only six steps with a good overall yield starting from commercially available glutaconic acid. (C) 2009 Elsevier Ltd. All rights reserved.
A novel organocatalyticformal [3 + 2] cycloaddition reaction with in situ generation of N-carbamoyl nitrones is presented. For the first time, N-Boc- and N-Cbz-protected isoxazolidines have been directly obtained as single diastereoisomers in generally high yields and enantiomeric excesses using mild reaction conditions and inexpensive, readily available Cinchona alkaloid quaternary ammonium salts
Novel stereoselective syntheses of (2E,4E)-4-(4,4-dimethylpent-2-ynylidene)-N1,N5-dimethyl-N1,N5-bis(naphthalen-1-ylmethyl)pent-2-ene-1,5-diamine
作者:Lino Colombo、Marcello Di Giacomo、Massimo Serra、Simone M. Tambini
DOI:10.1016/j.tet.2009.04.095
日期:2009.7
We report two different synthetic approaches for the stereoselective synthesis of (2E,4E)-4-(4,4-dimethylpent-2-ynylidene)-N-1,N-5-dimethyl-N-1,N-5-bis(naphthalen-1-ylmethyl)pent-2-ene-1,5-diamine important impurity-reference standard for the chemical characterization of terbinafine. The diamine 1 was obtained in only six steps with a good overall yield starting from commercially available glutaconic acid. (C) 2009 Elsevier Ltd. All rights reserved.