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Volumn 47, Issue 23, 2006, Pages 3811-3814

A regioselective synthesis of 3-benzazepinones via intramolecular hydroamidation of acetylenes

Author keywords

[No Author keywords available]

Indexed keywords

3 BENZAZEPINONE DERIVATIVE; ACETAMIDE; ACETYLENE DERIVATIVE; ALKYNE DERIVATIVE; AMIDE; BENZAZEPINE DERIVATIVE; BENZENE DERIVATIVE; PALLADIUM; POTASSIUM HYDROXIDE; UNCLASSIFIED DRUG;

EID: 33748131297     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2006.03.198     Document Type: Article
Times cited : (61)

References (29)
  • 6
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    • For recent reviews, see
    • For recent reviews, see. Cacchi S. J. Organomet. Chem. 576 (1999) 42
    • (1999) J. Organomet. Chem. , vol.576 , pp. 42
    • Cacchi, S.1
  • 9
    • 17044387152 scopus 로고    scopus 로고
    • Synthesis of 3-benzazepines from propargyl ethers using a Pd catalyst with a bidentate ligand was reported
    • Synthesis of 3-benzazepines from propargyl ethers using a Pd catalyst with a bidentate ligand was reported. Tsubakiyama M., Sato Y., and Mori M. Heterocycles 64 (2004) 27
    • (2004) Heterocycles , vol.64 , pp. 27
    • Tsubakiyama, M.1    Sato, Y.2    Mori, M.3
  • 14
    • 33748139714 scopus 로고    scopus 로고
    • note
    • The structure of compound 13 was confirmed by NOE NMR experiments.
  • 17
    • 0009544858 scopus 로고
    • a = 17 (March, J. Advanced Organic Chemistry, 4th ed; 1992; pp 250-252). A base as strong as NaH could promote direct hydroamidation of alkyne
    • a = 17 (March, J. Advanced Organic Chemistry, 4th ed; 1992; pp 250-252). A base as strong as NaH could promote direct hydroamidation of alkyne. Nagarajan A., and Balasubramanian T.R. Indian J. Chem., Sect. B: Org. Chem. Incl., Med. Chem. 28B (1989) 67
    • (1989) Indian J. Chem., Sect. B: Org. Chem. Incl., Med. Chem. , vol.28 B , pp. 67
    • Nagarajan, A.1    Balasubramanian, T.R.2
  • 19
    • 0001985161 scopus 로고    scopus 로고
    • For examples of Pd-catalyzed hydroamidation of alkynes, see Ref. 4 and
    • For examples of Pd-catalyzed hydroamidation of alkynes, see Ref. 4 and. Khan M.W., and Kundu N.G. Synlett (1997) 1435
    • (1997) Synlett , pp. 1435
    • Khan, M.W.1    Kundu, N.G.2
  • 23
    • 33748127858 scopus 로고    scopus 로고
    • note
    • 3 in DMF at 60 °C for 16 h gave 12 in 32% LC/MS yield. Usage of ligand dppb could improve the yield of 12 to ∼60%.
  • 24
    • 33748208588 scopus 로고    scopus 로고
    • note
    • 19NO (MW 229.15): C, 78.56; H, 8.35; N, 6.11. Found: C, 78.61; H, 8.28; N, 6.06.
  • 25
    • 33748156039 scopus 로고    scopus 로고
    • note
    • The corresponding desilylated acetylene did not give any benzazepinone product either.
  • 26
    • 33748200334 scopus 로고    scopus 로고
    • note
    • It should be noted that heating NaH in DMF should be handled with care because of safety issues. Thanks to a reviewer's suggestion to add this note.
  • 27
    • 33748193600 scopus 로고    scopus 로고
    • The structure was proposed based on the reported data of analogous compounds (Kubo, Y.; Suto, M.; Tojo, S.; Araki, T. J. Chem. Soc., Perkin Trans. 1 1986, 771), 1-benzyl-2H-isoquinolin-3-one (Cánepa, A. S.; Bravo, R. D. J. Heterocycl. Chem. 2004, 41, 979) and 3-methyl-4-phenyl-2H-3-benzazepin-2-one (Kato, H.; Kobayashi, T.; Horie, K.; Ogura, K.; Moriwaki, M. J. Chem. Soc., Perkin Trans. 1 1993, 1055).
  • 28
    • 33748137589 scopus 로고    scopus 로고
    • note
    • No further purification of the mixture was performed. Possible subsequent reactions with 19 include tautomerization, oxidation, and dimerization.
  • 29
    • 33748177715 scopus 로고    scopus 로고
    • note
    • Heating 2-[1-(4-methoxyphenyl)ethynyl]-N-methyl benzeneacetamide with NaH in DMF at 60 °C; however, gave 6-exo cyclization products as well.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.