Samarium(II)-induced ring-expansion reaction of 1,2- cyclobutanedicarboxylates to produce cyclopentanones

Tetrahedron Letters

Volumn 45, Issue 7, 2004, Pages 1495-1498

  Shinohara, Ikuo ^a   Nagaoka, Hiroto ^a  

^a MEIJI PHARMACEUTICAL UNIVERSITY   (Japan)

Author keywords

Cyclobutanes; Cyclopentanones; Radicals and radical reactions; Ring transformation; Samarium and compounds

Indexed keywords

CARBOXYLIC ACID DERIVATIVE; CYCLOBUTANE DERIVATIVE; CYCLOPENTANONE DERIVATIVE; HEMPA; METHANOL; SAMARIUM;

ARTICLE; CATALYSIS; CHEMICAL REACTION; DIECKMANN REACTION; FRAGMENTATION REACTION; POLYMERIZATION;

EID: 1642538422     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2003.12.047     Document Type: Article

References (20)

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14. 3): δ 25.5, 26.1, 26.8, 43.2, 45.8, 52.1, 52.3, 60.4, 169.9, 212.4.
15. 1H NMR.
16. Compounds 3 , 4 and 5 were all diastereomeric mixtures but no determination was made of their respective amounts.
17. 3) of 22b : δ 24.7, 27.2, 35.6, 36.5, 41.3, 42.3, 45.5, 72.2 (Fig. 1 ).
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