Pyridine Syntheses.<b>II</b>. Condensation Routes Toward Streptonigrin Ring C
作者:J. Michael Robinson、Masood Ahmed、Nicky J. Alaniz、Timothy R. Boyles、Chris D. Brasher、Kimberly A. Floyd、Preston L. Holland、Laura D. Maruffo、Terry L. Mcmahan、Stan Middleton、Kevin D. O'Hara、Marcia J. Pack、Brandon D. Reynolds、Romelia R. Rodriquez、Dennis E. Sawyer、Elena Sharp、Sharai L. Simpson、Clint L. Vanlandingham、Rebecca S. Velasquez、Brian M. Welch、C. David Wright
DOI:10.1002/jhet.5570350113
日期:1998.1
Alternative complimentary syntheses of penta-substituted pyridinerings with full regiochemical control of substituents were studied as a method for the synthesis of Streptonigrin (1). Various α-substituted acetophenones 2 were reacted with enones 3 in acetic acid/ammonium acetate and air to afford penta-substituted pyridines 4. α-Substituents that could provide a source of exocyclic nitrogen at position