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Formation and structure elucidation of two novel spiro[2H-indol]-3(1H)-ones

✍ Scribed by Janez Košmrlj; Stanislav Kafka; Ivan Leban; Marjeta Grad

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
246 KB
Volume
45
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The molecular structures of two byproducts 1,1″‐diphenyl‐3′,4′‐dihydrodispiro[indole‐2,2′‐furan‐5′,2″‐indole]‐3,3″(1__H__, 1″H)‐dione (3) and 1,5′‐diphenyl‐4′,5′‐dihydro‐3′H‐spiro[indole‐2,2′‐pyrano[3,2‐b]indol]‐3(1__H__)‐one (4), which accompanied the rearrangement of 3‐hydroxy‐3‐methyl‐1‐phenylquinoline‐2,4(1__H__,3__H__)‐dione (1) to 2‐hydroxy‐2‐methyl‐1‐phenyl‐1,2‐dihydro‐3__H__‐indol‐3‐one (2), have been elucidated by NMR, MS, and X‐ray diffraction. Copyright © 2007 John Wiley & Sons, Ltd.

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