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- W2913603983 abstract "Abstract A highly regio‐ and stereoselective synthesis of 3‐alkylidene‐2‐oxindoles has been described through a nucleophilic vinylic substitution (S N V) of ( E )‐3‐(nitromethylene)indolin‐2‐one using pyrazol‐3‐ones as nucleophiles and Et 3 N as a base. The reaction affords selectively the Z ‐isomer when pyrazol‐3‐ones without substituents at the 4 position are used. While the reaction is E ‐selective with 4‐substituted pyrazolones. The stereoselectivity (up to >20:1) and the yields (up to 98%) are very high under mild reaction conditions. magnified image" @default.
- W2913603983 created "2019-02-21" @default.
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- W2913603983 date "2019-03-05" @default.
- W2913603983 modified "2023-10-16" @default.
- W2913603983 title "Regio‐ and Stereoselective Synthesis of 3‐Pyrazolylidene‐2‐oxindole Compounds by Nucleophilic Vinylic Substitution of ( <i>E</i> )‐3‐(Nitromethylene)indolin‐2‐one" @default.
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- W2913603983 doi "https://doi.org/10.1002/adsc.201900048" @default.
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