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Volumn 14, Issue 16, 2008, Pages 4792-4795

Pd-catalyzed cross-coupling reactions with carbonyls: Application in a very efficient synthesis of 4-aryltetrahydropyridines

Author keywords

Carbonyl compounds; Cross coupling palladium; Piperidine; Polysubstituted olefins

Indexed keywords

ALDEHYDES; CARBONYLATION; COUPLING AGENTS; KETONES; OLEFINS; ORGANIC COMPOUNDS; ORGANOMETALLICS; SYNTHESIS (CHEMICAL);

EID: 54349085575     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.200800390     Document Type: Article
Times cited : (117)

References (64)
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    • We speculate that the dramatically different behavior between NBoc and N-alkyl tosylhydrazones, might be due to the particular steric requirements imposed by the Boc group. According to our mechanistic proposal (see ref. [10]), the last step of the catalytic cycle is a β-hydrogen elimination, requiring a syn arrangement of the Pd and the hydrogen atom, which might be difficult in the N-Boc-substituted system. Therefore, the thermal uncatalyzed tosylhydrazone decomposition to give tetrahydropyridine 3 becomes the main reaction pathway.
    • We speculate that the dramatically different behavior between NBoc and N-alkyl tosylhydrazones, might be due to the particular steric requirements imposed by the Boc group. According to our mechanistic proposal (see ref. [10]), the last step of the catalytic cycle is a β-hydrogen elimination, requiring a syn arrangement of the Pd and the hydrogen atom, which might be difficult in the N-Boc-substituted system. Therefore, the thermal uncatalyzed tosylhydrazone decomposition to give tetrahydropyridine 3 becomes the main reaction pathway.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.