Unusual reaction of 3-chloro-3-nitroalkylindolin-2-ones.
作者:HIROTAKA OTOMASU、KEI YOSHIDA、KYUJI NATORI
DOI:10.1248/cpb.23.1436
日期:——
The reaction of 3-chloro-3-nitromethylindolin-2-one (2a) with aniline resulted the formation of 3-anilinomethylene-(4a) and 3-(p-phenylazo) anilinomethyleneindolin-2-one (5). Chromatographying of 2a, b using Al2O2 in chloroform solution gave 3-nitro-methyleneindolin-2-ones (7a, b), which were also reacted with amines to give 3-amino-methyleneindolin-2-ones (4a, b and 8a, b).
A Morita–Baylis–Hillman Pathway to Wittig Products: One‐Pot Transformation of Nitroalkylideneoxindoles to Oxindolylidene‐Carboxylates
作者:Lakshminarayana Satham、Chenikkayala Siva Sankara、Irishi N. N. Namboothiri
DOI:10.1002/ejoc.202000852
日期:2020.11.30
Reaction of nitroalkylideneoxindoles with selected activated carbonyl compounds under Morita–Baylis–Hillman (MBH) conditions (DABCO/CH3CN) led to unexpected formation of Wittig type products. While the first two steps involve MBH pathway (Michael addition and aldol reaction), the subsequent steps in this one‐pot process are presumably intramolecular substitution and elimination.