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Intramolecular Reaction of a Phenonium Ion. Novel Lactonization of 4-Aryl-5-tosyloxypentanoates and 4-Aryl-5-tosyloxyhexanoates Concomitant with a Phenyl Rearrangement.

✍ Scribed by Shinji Nagumo; Machiko Ono; Yo-ichiro Kakimoto; Tsuneo Furukawa; Tomoaki Hisano; Megumi Mizukami; Norio Kawahara; Hiroyuki Akita

Publisher: John Wiley and Sons
Year: 2003
Weight: 206 KB
Volume: 34
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200307090

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## Abstract A convenient method for the synthesis of a novel series of 11, specifically substituted, noncondensed 5,5‐bicycles 2‐[3‐phenyl‐5‐hydroxy‐5‐trichloromethyl‐4,5‐dihydro‐1H‐pyrazol‐1‐yl]‐4‐aryl‐5‐alkylthiazoles (**3a–k**; 65–94% yield) from the reactions of 3‐phenyl‐5‐hydroxy‐5‐trichlorome