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A new synthesis of pyridazinones from carbohydrate precursors, using the wittig reagent

✍ Scribed by El Sayed H. El Ashry; Mohamed M.A. Abdel Rahman; Yeldez El Kilany; Adel Amer

Book ID
108308698
Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
122 KB
Volume
87
Category
Article
ISSN
0008-6215

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Scheme 2. Reagents and conditions: (a) p-TsCl, pyridine, dry CH 2 Cl 2 , 0Β°C-rt, 14 h; (b) LiAlH 4 , dry THF, 0Β°C-rt, 18 h; (c) NaH, PMBBr, dry THF, 0Β°C-rt, 4 h; (d) 60% aq. AcOH, cat. HCl, rt, 14 h; (e) NaIO 4 , MeOH/H 2 O (2:1), rt, 2 h; (f) Ph 3 P CHCOO(CH 2 ) 2 SO 2 Tol, 110Β°C, 1 h; (g) cat. HCl