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ChemInform Abstract: Polar Cycloaddition of 9-Thiaphenanthrenium Salt with 1,3-Dienes.

โœ Scribed by H. SHIMIZU; S. MIYAZAKI; T. KATAOKA

Publisher
John Wiley and Sons
Year
2010
Weight
31 KB
Volume
28
Category
Article
ISSN
0931-7597

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ChemInform Abstract: Novel Polar Cycload
ChemInform Abstract: Novel Polar Cycloaddition of 1,2-Thiazinylium Salt.
โœ Hiroshi Shimizu; Takashi Hatano; Takayuki Matsuda; Tatsunori Iwamura ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› John Wiley and Sons โš– 29 KB

Novel Polar Cycloaddition of 1,2-Thiazinylium Salt. -Treatment of the thiazine 5-oxide (I) according to A) affords a thiazinylium tetrafluoroborate which undergoes cycloaddition with the butadienes (II) and (V) to give heterocyclic adducts. Ring transformation of cycloadduct (IIIa) yields the pyrrol