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Volumn 72, Issue 3, 1999, Pages 511-517

Donor-acceptor binary photocatalysis system illustrated by the intramolecular cyclization of a cyclopropanone acetal tethered to cyclohexen- 2-one

Author keywords

[No Author keywords available]

Indexed keywords

ACETAL DERIVATIVE; CYCLOHEXEN 2 ONE; CYCLOPROPANONE ACETAL; HETEROCYCLIC COMPOUND; UNCLASSIFIED DRUG;

EID: 0032949307     PISSN: 00092673     EISSN: None     Source Type: Journal    
DOI: 10.1246/bcsj.72.511     Document Type: Article
Times cited : (8)

References (52)
  • 1
    • 0001240356 scopus 로고
    • which cites 32 papers
    • A number of studies have been reported on the donor character and synthetic use of cyclopropanes. For the references, see: M. Abe and A. Oku, J. Org. Chem., 60, 3065 (1995), which cites 32 papers.
    • (1995) J. Org. Chem. , vol.60 , pp. 3065
    • Abe, M.1    Oku, A.2
  • 20
    • 85038184200 scopus 로고    scopus 로고
    • note
    • All compounds 5, 7, and 21 have a three-carbon chain which divides the cyclopropane and cyclohexenone moieties. Other homologues bearing a shorter or longer chain on irradiation did not give cyclized products but decomposed via the Norrish Type II fission to give alkenylcydopropanes.
  • 31
    • 85038188548 scopus 로고    scopus 로고
    • note
    • 2 and solvents, was found unsuccessful (Scheme 7).
  • 45
    • 85038185928 scopus 로고    scopus 로고
    • note
    • We use the term "catalyst" instead of "sensitizer" because these aromatic hydrocarbons activate the donor-acceptor binary systems by the electron transfer process but not by energy transfer.
  • 46
    • 85038180645 scopus 로고    scopus 로고
    • note
    • On the basis of our previous study (Ref. 8) where the fluorescence quenching experiments (excitation at 350 nm, detection at 372 and 391 nm) for the singlet excited state of pyrene by diethyl fumarate and cyclopropanone acetal 1, respectively, proved efficient quenching only by fumarate, it is rather clear that pyrene (and presumably phenanthrene) in its singlet excited state functions as a donor in the present SET systems.
  • 47
    • 85038193287 scopus 로고    scopus 로고
    • note
    • The cyclization systems we adopted, e.g. 5, have both donor and acceptor functionalities. Therefore, a donor-type catalyst may first activate the carbonyl moiety whereas an acceptor-type catalyst may activate the cyclopropane moiety. See also Refs. 8 and 22.
  • 48
    • 85038176660 scopus 로고    scopus 로고
    • note
    • .- and the cation radical of 1, thus producing β-carbonyl radical 25. This effect of silyl substituents constitutes the working basis in most of our preceding studies (Refs. 1, 2, 3, 4, 5, and 8).
  • 51
    • 0000910861 scopus 로고
    • ed by A. Padwa, Marcel Dekker, New York
    • .-) = -1.60 vs. SCE: S. L. Mattes and S. Farid, in "Organic Photochemistry," ed by A. Padwa, Marcel Dekker, New York (1983), Vol. 6, p. 233.
    • (1983) Organic Photochemistry , vol.6 , pp. 233
    • Mattes, S.L.1    Farid, S.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.