Photocycloaddition on 2-methyloxazolo[5,4-b]pyridine: A route to the oxazolo[5,4-b]azocine system

Tetrahedron Letters

Volumn 37, Issue 32, 1996, Pages 5783-5786

  Donati, Donato ^a   Fusi, Stefania ^a   Ponticelli, Fabio ^a  

^a UNIVERSITY OF SIENA   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

OXAZOLE DERIVATIVE;

ARTICLE; DRUG SYNTHESIS; MASS SPECTROMETRY; NUCLEAR MAGNETIC RESONANCE; PHOTOCHEMISTRY; REACTION ANALYSIS; STEREOCHEMISTRY; TECHNIQUE;

EID: 0030570855     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/0040-4039(96)01225-7     Document Type: Article

References (9)

1. 1. Donati D., Fusi S., Ponticelli F. and Tedeschi P. Heterocycles 1988, 27, 1899
2. 2. Donati D., Ponticelli F., Bicchi P. and Meucci M. J. Phys. Chem. 1990, 94, 5271.
3. 3. Improved synthesis of 3-Methyloxazolo[5,4-b]pyridine (60% yield) was achieved following the procedure reported for the oxazolo[4,5-b]pyridines by M. Doise et. al.: Tetrahedron Lett. 1990, 31, 1155.
4. 8) ppm.
5. 2). List of the fractional atomic coordinates, bond lenghts and angles, thermal parameters have been deposited at the Cambridge Crystallographic Data Center, U.K. as supplementary material.
6. 6. Somekawa K., Kumamoto S., Matsuo T., Ueda I. Tetrahedron 1980, 36, 81.
7. 7. Momicchioli F., Baraldi I., Bruni M.C. Chem Phys. 1983 82, 229; Baraldi I.,Carnevali A., Momicchioli F., Ponterini G. Spectrochim. Ada 1993, 49A, 471.
8. 7. Momicchioli F., Baraldi I., Bruni M.C. Chem Phys. 1983 82, 229; Baraldi I.,Carnevali A., Momicchioli F., Ponterini G. Spectrochim. Ada 1993, 49A, 471.
9. 8. Lowest singlet levels (e.V. ) obtained by CS-INDO-CI methods, including selected double and triple excitations: [4,5-b] 4.319(π-π*), 4.368(n-π*) ; [4,5-c] 4.699(n-π*), 4.732(π-π*) ; [5,4-c] 4.305 (n-π*), 4.514(π-π*) ; [5,4-b] 4.354(π-π*), 4.483(n-π*).