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Volumn 73, Issue 12, 2008, Pages 4630-4637

Tandem conjugate additions and 3-aza-cope rearrangements of tertiary allyl amines and cyclic α-vinylamines with acetylenic sulfones. Applications to simple and iterative ring expansions leading to medium and large-ring nitrogen heterocycles

Author keywords

[No Author keywords available]

Indexed keywords

ADDITION REACTIONS; AMINATION; AMINES; CHEMICAL REACTIONS; EXPANSION; METHANOL; NETWORK PROTOCOLS; NITROGEN; ORGANIC COMPOUNDS; PHOTODISSOCIATION; RATE CONSTANTS; SYNTHESIS (CHEMICAL);

EID: 45249096033     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo800600a     Document Type: Article
Times cited : (55)

References (71)
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    • For recent examples of 2-aza-Cope rearrangements, see: (a) Merino, P.; Tejero, T.; Mannucci, V. Tetrahedron Lett. 2007, 48, 3385-3388.
    • For recent examples of 2-aza-Cope rearrangements, see: (a) Merino, P.; Tejero, T.; Mannucci, V. Tetrahedron Lett. 2007, 48, 3385-3388.
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    • For recent examples of 3-aza-Cope rearrangements, see: (a) Waetzig, S. R.; Tunge, J. A. J. Am. Chem. Soc. 2007, 129, 4138-4139.
    • For recent examples of 3-aza-Cope rearrangements, see: (a) Waetzig, S. R.; Tunge, J. A. J. Am. Chem. Soc. 2007, 129, 4138-4139.
  • 28
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    • For a related example of a 1-aza-Cope rearrangement (formally the reverse of a 3-aza-Cope process), see: Kang, J.; Kim, T. H.; Yew, K. H.; Lee, W. K. Tetrahedron Asymmetry 2003, 14, 415-418.
    • (h) For a related example of a 1-aza-Cope rearrangement (formally the reverse of a 3-aza-Cope process), see: Kang, J.; Kim, T. H.; Yew, K. H.; Lee, W. K. Tetrahedron Asymmetry 2003, 14, 415-418.
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    • For a discussion of the use of the terms 3-aza-Cope and 3-aza-Claisen, see note 1 in Walters, M. A. J. Org. Chem. 1996, 61, 978-983.
    • For a discussion of the use of the terms "3-aza-Cope" and "3-aza-Claisen", see note 1 in Walters, M. A. J. Org. Chem. 1996, 61, 978-983.
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    • For example, ab initio calculations by Walters (ref 4) revealed that the activation energy for the [3,3] sigmatropic rearrangement of allyl vinyl amine is 34.6 kcal/mol, whereas that for its protonated counterpart is only 21.4 kcal/mol. For early examples of the beneficial effects of quaternization or Lewis acid catalysis, see references cited therein.
    • For example, ab initio calculations by Walters (ref 4) revealed that the activation energy for the [3,3] sigmatropic rearrangement of allyl vinyl amine is 34.6 kcal/mol, whereas that for its protonated counterpart is only 21.4 kcal/mol. For early examples of the beneficial effects of quaternization or Lewis acid catalysis, see references cited therein.
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    • For a review of the synthesis of nitrogen and oxygen heterocycles by ring-closing metathesis, see
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    • For earlier studies of aza-Cope reactions that proceed via dipolar intermediates produced from tertiary allyl amines and DMAD or propiolate esters, see: (a) Vedejs, E, Gingras, M. J. Am. Chem. Soc. 1994, 116, 579-588
    • For earlier studies of aza-Cope reactions that proceed via dipolar intermediates produced from tertiary allyl amines and DMAD or propiolate esters, see: (a) Vedejs, E.; Gingras, M. J. Am. Chem. Soc. 1994, 116, 579-588.
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    • Allyldibenzylamine (1a) was prepared from allyl bromide and dibenzylamine by the method of Alcaide, B.; Almendros, P.; Alonso, J.; Aly, M. F. Org. Lett. 2001, 3, 3781-3784. N-Allylmorpholine (1b) and N-allylamine 1c were prepared similarly.
    • Allyldibenzylamine (1a) was prepared from allyl bromide and dibenzylamine by the method of Alcaide, B.; Almendros, P.; Alonso, J.; Aly, M. F. Org. Lett. 2001, 3, 3781-3784. N-Allylmorpholine (1b) and N-allylamine 1c were prepared similarly.
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    • Compounds 5a and 5b were previously investigated in aza-Cope rearrangements of chromium carbene complexes: Deur, C. J.; Miller, M. W.; Hegedus, L. S J. Org. Chem. 1996, 61, 2871-2876.
    • Compounds 5a and 5b were previously investigated in aza-Cope rearrangements of chromium carbene complexes: Deur, C. J.; Miller, M. W.; Hegedus, L. S J. Org. Chem. 1996, 61, 2871-2876.
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    • For related examples of dissociative mechanisms involving C-N bond cleavage, see refs 12a and 12c.
    • (a) For related examples of dissociative mechanisms involving C-N bond cleavage, see refs 12a and 12c.
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    • For examples where vinylaziridines underwent aza-Cope rearrangements upon addition to other unsaturated electrophiles, in contrast to the ring-opening of 12, see refs 31, 12e and 12f
    • (b) For examples where vinylaziridines underwent aza-Cope rearrangements upon addition to other unsaturated electrophiles, in contrast to the ring-opening of 12, see refs 31, 12e and 12f.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.