作者:James W. Pavlik、Vuthichai Ervithayasuporn、Supawan Tantayanon
DOI:10.1002/jhet.562
日期:2011.5
AbstractSynthetic methods have been developed to prepare pyrano[2,3‐c]pyrazoles with various substituents at ring positions 1, 3, and 6. The 1H‐ and 13C‐NMR properties of these products and their precursors are presented and discussed. J. Heterocyclic Chem., (2011).
CANTOS, ALBERT;MARCH, PEDRO DE;MORENO-MANAS, MARCIAL;PLA, ANNA;SANCHEZ-FE+, BULL. CHEM. SOC. JAP., 60,(1987) N 12, # 4425-4431
作者:CANTOS, ALBERT、MARCH, PEDRO DE、MORENO-MANAS, MARCIAL、PLA, ANNA、SANCHEZ-FE+
DOI:——
日期:——
Synthesis of Pyrano[4,3-<i>c</i>]pyrazol-4(1<i>H</i>)-ones and -4(2<i>H</i>)-ones from Dehydroacetic Acid. Homo- and Heteronuclear Selective NOE Measurements for Unambiguous Structure Assignment
作者:Albert Cantos、Pedro de March、Marcial Moreno-Mañas、Anna Pla、Francisco Sanchez-Ferrando、Albert Virgili
DOI:10.1246/bcsj.60.4425
日期:1987.12
Cyclization of dehydroacetic acid N-substituted hydrazones furnished 1-substituted 3,6-dimethylpyrano[4,3-c]pyrazol-4(1H)-ones, together with varying amounts of N,N′-disubstituted 5-hydroxy-3-methyl-4-(3-methyl-1H-pyrazol-5-yl)-1H-pyrazoles. The same pyranopyrazolones were obtained regioselectively without side reactions from N-alkylhydrazines and 4-chloro-3-(1-chlorovinyl)-6-methyl-2H-pyran-2-one