Stereoselective synthesis of bicyclo[3.1.1]heptane derivatives via intramolecular photocycloaddition reaction.
Nat Prod Commun
; 7(4): 459-62, 2012 Apr.
Article
en En
| MEDLINE
| ID: mdl-22574441
ABSTRACT
Optically active 1,3-bridged cyclobutanes 10 of the bicyclo[3.1.1]heptane ring system and 1,2-bridged cyclobutanes 11 of the bicyclo[3.2.0]heptane ring system were produced by UV irradiation of alpha,beta,gamma,delta-unsaturated esters 9a and 9c-f. The preference of endo-stereochemistry at C-6 bridged head was observed in cross-adducts 10. On the other hand, irradiation of conjugated dienol 9b led via only parallel cycloaddition to 1,2-bridged cyclobutane 11.
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Bases de datos:
MEDLINE
Asunto principal:
Compuestos Bicíclicos con Puentes
/
Heptanos
Idioma:
En
Revista:
Nat Prod Commun
Año:
2012
Tipo del documento:
Article
País de afiliación:
Japón