Novel Synthesis of 7-Fluoro-8-(trifluoromethyl)- 1<i>H</i>-1,6-naphthyridin-4-one Derivatives: Intermolecular Cyclization of an <i>N</i>-Silyl-1-azaallyl Anion with Perfluoroalkene and Subsequent Intramolecular Skeletal Transformation of the Resulting Pentasubstituted Pyridines
In this study, fluorine-containing pentasubstituted pyridine derivatives 9a-m were prepared regioselectively in good yields by the intermolecular cyclization of a variety of N-silyl-1-azaallylic anion intermediates 7, which were generated from a functionalized silane 5 and an aromatic/aliphatic nitrile 6 with perfluoroalkene 8. Also, 7-fluoro-8-(trifluoromethyl)-1H-1,6-naphthyridin-4-one derivatives 11a-k were synthesized in excellent yields by the subsequent base-promoted intramolecular skeletal transformation of the resulting pyridine derivatives 10a-k.
[EN] NEW ROUTES TO TRANS A,B-SUBSTITUTED BACTERIOCHLORINS<br/>[FR] NOUVELLES VOIES POUR DES BACTÉRIOCHLORINES TRANS A,B-SUBSTITUÉES
申请人:UNIV NORTH CAROLINA STATE
公开号:WO2013062670A3
公开(公告)日:2014-05-08
A <i>trans</i>-AB-Bacteriochlorin Building Block
作者:Olga Mass、Jonathan S. Lindsey
DOI:10.1021/jo201967k
日期:2011.11.18
-one). Here, four new results are reported concerning the synthesis of substituted bacteriochlorins. First, a new, scalable route to 1,1-dimethoxy-4-methylpent-3-en-2-one removes a significant previous impediment to the overall route. Second, the new route was employed to gain access to new α,β-unsaturatedketones and corresponding dihydrodipyrrins bearing alternative substituents in place of the dimethoxy