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Volumn 137, Issue 24, 2015, Pages 7564-7567

Iodoarene-Catalyzed Stereospecific Intramolecular sp3 C-H Amination: Reaction Development and Mechanistic Insights

Author keywords

[No Author keywords available]

Indexed keywords

CHEMISTRY; SYNTHESIS (CHEMICAL);

EID: 84934928301     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/jacs.5b03488     Document Type: Article
Times cited : (129)

References (70)
  • 52
    • 84935012914 scopus 로고    scopus 로고
    • note
    • The treatment of 3a with sodium hydride gave the N?O bond cleavage product in 85% yield. For details, see the SI.
  • 53
    • 84934932673 scopus 로고    scopus 로고
    • note
    • We studied the effect of the nitrogen substituents by DFT calculations. The change of the OMe group to Ph and Me groups increases the C-H amination barrier from 19.2 kcal/mol (Figure 1a) to 24.7 and 44.3 kcal/mol, respectively. For details, see the SI.
  • 54
    • 84935007858 scopus 로고    scopus 로고
    • note
    • Substrates with secondary and primary C-H bonds and substrates with aliphatic tethers are unsuccessful. For details, see the SI.
  • 55
    • 84935005122 scopus 로고    scopus 로고
    • note
    • The computed activation free energies for the secondary (2-ethyl-N-methoxybenzamide) and primary (2-methyl-N-methoxybenzamide) C-H aminations are 22.4 and 28.5 kcal/mol, much higher than that for the tertiary one (19.2 kcal/mol, Figure 1a). For details, see the SI.
  • 56
    • 84934972517 scopus 로고    scopus 로고
    • note
    • For substrate 1u, the computed activation free energy for the aromatic C-H amination is 1.9 kcal/mol lower than that for the secondary C-H amination. For details, see the SI.
  • 57
    • 84934920234 scopus 로고    scopus 로고
    • note
    • For the discussion of the radical mechanism, see the SI.
  • 59
    • 84935027323 scopus 로고    scopus 로고
    • note
    • Geometry optimizations and frequency calculations were performed at the M06-2X/6-31G(d)[SDD, for I] level. Single-point energy calculations in TFE using the CPCM model were performed at the M06-2X/6-311+G(d,p)[SDD, for I] level. For details, see the SI.
  • 63
    • 84934921606 scopus 로고    scopus 로고
    • note
    • The formation of oxygen-bonded iodonium cation B′ from intermediate A is calculated to be endergonic by 27.9 kcal/mol in TFE.
  • 67
    • 84934942757 scopus 로고    scopus 로고
    • note
    • For the determination of the absolute configuration, see the SI.
  • 68
    • 84934988953 scopus 로고    scopus 로고
    • note
    • Under "DFT-computed conditions" [PhI(OAc)2 as oxidant and TFE as solvent], the transformation of (S)-1m to (R)-3m also occurs with complete stereochemical fidelity. For details, see the SI.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.