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Volumn 71, Issue 21, 2006, Pages 8126-8139

Tandem pseudopericyclic reactions: [1,5]-X sigmatropic shift/6π- electrocyclic ring closure converting N-(2-X-carbonyl)phenyl ketenimines into 2-X-quinolin-4(3H)-ones

Author keywords

[No Author keywords available]

Indexed keywords

CYCLIZATION; ENERGY BARRIERS; KETENIMINES; PSEUDOPERICYCLIC REACTIONS;

EID: 33750005055     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo061286e     Document Type: Article
Times cited : (50)

References (134)
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    • note
    • The experimental work related with the [1,5]-migration of alkyl(aryl)thio groups in N-[2-alkyl(aryl)thiocarbonyl]phenyl ketenimines has been reported in our preliminary communication, ref 13.
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    • We have reported that a similar ring closure transforming N-β-(methyleneaminoacyl)vinyl ketenimine into 6-methyleneamino-2-methylene- 1,3-oxazine takes place trough a transition state of pseudopericyclic topology and low energy barrier; see: Alajarín, M.; Sánchez-Andrada, P.; Vidal, A.; Tovar, F. J. Org. Chem. 2005, 70, 1340-1349.
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    • note
    • For comparative purposes, we have also optimized the transition state corresponding to the [1,5]-H migration in 1,3-pentadiene, although it has been extensively studied previously by others (see ref 17 and references cited herein).
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    • (a) An analogous finding was accomplished in the study of the effect of several substituents in the vinylketene-acylallene rearrangement reported by Wentrup et al.: the [1,3]-shift in the dimethylamino group takes place involving the formation of a zwitterionic intermediate. See: Bibas, H.; Wong, M. W.; Wentrup, C. Chem.-Eur. J. 1997, 3, 237-248.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.