The order of first bond formation in the intramolecular photocycloaddition of 2-(4'-pentenyl)-cyclohex-2-enones

Tetrahedron Letters

Volumn 38, Issue 34, 1997, Pages 6083-6086

  Haddad, Nizar ^a   Galili, Nitsa ^a  

^a TECHNION ISRAEL INSTITUTE OF TECHNOLOGY   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

POLYCYCLIC HYDROCARBON;

ARTICLE; DRUG SYNTHESIS; ENANTIOMER; IN VITRO STUDY; METHODOLOGY; PHOTOCHEMISTRY; REACTION ANALYSIS; STEREOCHEMISTRY; X RAY ANALYSIS;

EID: 0030788733     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(97)01373-7     Document Type: Article

References (17)

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11. 80-W Hanau mercury vapor lamp (Q-81) was used for irradiations via a Uranium glass filter (λ > 330). All irradiations were carried out in 18 mL of hexane as solvent under nitrogen atmosphere. The concentrations always kept below 0.05 M and the reactions followed by TLC or GC.
12. All new compounds were characterized by full spectroscopic data, yields refer to chromatographed materials with purity of >95%. The relative stereochemical relationship of the stereogenic centers was determined by NOE-difference. The location of these protons determined by COSY-45, XH-CORR, JMOD-XH methods and was supported by NOE experiments. For determination of similar structures by NMR see ref. la and: Becker, D.; Haddad, N. Isr. J. Chem. 1989, 29, 303.
13. -3. (a) Sheldrick, G. M. Acta Crystallogr. 1990, A46, 467;
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15. For recent examples of 1,6-radical aromatic substitution see ref. 3b and: Caldwell, R. A.; Diaz, J. F.; Hrneir, D. C.; Unett, D. J. J. Am. Chem. Soc. 1994, 116, 8138.
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