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Volumn 75, Issue 20, 2010, Pages 6764-6770

Preparation of phenanthrenes by photocyclization of stilbenes containing a tosyl group on the central double bond. A versatile approach to the synthesis of phenanthrenes and phenanthrenoids

Author keywords

[No Author keywords available]

Indexed keywords

IRRADIATION;

EID: 77957889288     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo100742e     Document Type: Article
Times cited : (37)

References (66)
  • 46
    • 0007682073 scopus 로고
    • For a list or reagents, with references, VCH: New York
    • For a list or reagents, with references, see: Larock Comprehensive Organic Transformations; VCH: New York, 1989; pp 151 - 152.
    • (1989) Larock Comprehensive Organic Transformations , pp. 151-152
  • 57
    • 77957896891 scopus 로고    scopus 로고
    • 3N. Although good yields of stilbenoids 9 can obtained, we do not recommend this procedure as it leads to a complex purification of stilbenoids 9.
    • 3N. Although good yields of stilbenoids 9 can obtained, we do not recommend this procedure as it leads to a complex purification of stilbenoids 9.
  • 66
    • 77957905057 scopus 로고    scopus 로고
    • The mechanism does not seem to involve a carbon-sulfur bond breakage, resulting in a carbon radical that would abstract a proton from the solvent, as irradiation of p -tolyl p -tolylmethyl sulfone and allyl p -tolyl sulfone in the presense of DBU leads to recovery of the starting compounds. In both compounds a carbon-sulfur bond breakage would be particularly easy as it would produce very stabilized p -methylbenzyl or allyl radicals.
    • The mechanism does not seem to involve a carbon-sulfur bond breakage, resulting in a carbon radical that would abstract a proton from the solvent, as irradiation of p -tolyl p -tolylmethyl sulfone and allyl p -tolyl sulfone in the presense of DBU leads to recovery of the starting compounds. In both compounds a carbon-sulfur bond breakage would be particularly easy as it would produce very stabilized p -methylbenzyl or allyl radicals.


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