- Conversion of Dipyridazinothiazines into Dipyridazinopyrroles through a Base-Induced Extrusion of Sulfur
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A novel ring contraction for the conversion of 2,7-disubstituted 10H-dipyridazinothiazine-1,6-(2H,7H)-diones (4'a-c) into the corresponding 2,6-disubstituted 9H-dipyridazinopyrrole-1,5(2H,6H)-diones (7'a-c), through a ba
- Kaji, Kenji,Nagashima, Hiromu,Oda, Hirohisa
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p. 1423 - 1432
(2007/10/02)
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- CONCURRENT FORMATION OF TWO ISOMERIC DIPYRIDAZINO-THIAZINES ATTENDED WITH OCCURRENCE OF A UNIQUE DIPYRIDAZINO-PYRROLE
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Interaction of 4-amino-5-mercapto-2-methyl-3(2H)-pyridazinone (1) and 4,5-dichloro-2-methyl-3(2H)-pyridazinone (3) in a basic medium, followed by benzylation, yielded concurrently 10-benzyl-2,7-dimethyl-dipyridazinothiazine-1,6(2H,7H)-
- Kaji, Kenji,Nagashima, Hiromu,Yamaguchi, Katsushi,Oda, Hirohisa
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p. 1507 - 1510
(2007/10/02)
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