Equential nitro-michael addition and reductive cyclization cascade reaction for diastereoselective synthesis of multifunctionalized 3,3′-pyrrolidinyl-spirooxindoles

TitleEquential nitro-michael addition and reductive cyclization cascade reaction for diastereoselective synthesis of multifunctionalized 3,3′-pyrrolidinyl-spirooxindoles
Publication TypeJournal Article
Year of Publication2025
AuthorsNichinde, CB, Bhati, M, Girase, AS, Patil, BR, Chaudhari, SS, Gamidi, RKrishna, Joshi, K, Kinage, AK
JournalEuropean Journal of Organic Chemistry
Volume28
Issue5
Date PublishedFEB
Type of ArticleArticle
ISSN1434-193X
Keywords3 `-pyrrolidinyl spirooxindoles, DFT study for regioselective cyclization, Diastereoselective 3, organocatalysis, Pd/C catalysed partial reductive spirocyclization
Abstract

In this investigation, we elucidated, one-pot two stage efficient synthesis of multifuctionalized spiro[oxindole -3,3 `-pyrrolidine]. The methodology proceeds via organocatalyzed nitro-Michael addition reaction between indolylidenecyanoesters and nitroalkanes to formed nitro-Michael adduct which transformed into multifunctionalized 3,3 `-pyrrolidinyl-spirooxindoles by metal catalyzed reductive cyclization cascade. DFT investigations were conducted to elucidate the mechanism underlying the preferential reduction of the nitro group, with subsequent attack on the nitrile and ester groups remain inert throughout the reaction process. The approach is operationally simple, easily scalable, exhibits compatibility with readily accessible starting material and catalysts, thereby emphasizing cost-effectiveness.

DOI10.1002/ejoc.202401121
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.5

Divison category: 
National Collection of Industrial Micr-organisms (NCIM)
Organic Chemistry
Physical and Materials Chemistry
Database: 
Web of Science (WoS)

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