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200517.fm Page 169 Friday, March 18, 2005 2:52 PM
2005
Fused pyridine derivatives
R 0450
Pt(II) or Ag(I) Salt Catalyzed Cycloisomerizations and Tandem Cycloadditions
Functionalized Azacyclic Arrays. — The ability of enesulfonamides to
17- 152 Forming
cyclize onto electron-deficient alkynes under the influence of platinum(II) or silver(I)
salt precatalysts is demonstrated. The reactions allow the preparation of functionalized
azahydrindan ring systems in high yields. They are either isolated or react within a tandem cyclization—cycloaddition. — (HARRISON, T. J.; DAKE*, G. R.; Org. Lett. 6
(2004) 26, 5023-5026; Dep. Chem., Univ. British Columbia, Vancouver,
B. C. V6T 1Z1, Can.; Eng.) — Steudel
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