The first in situ observation of intramolecular rotation and cyclization of anilide by an X-ray study: Partial single-crystal to single-crystal photocyclization of N-methyl-N-{(E)-methylmethacryloyl}anilide in inclusion crystals [9]

Journal of the American Chemical Society

Volumn 122, Issue 8, 2000, Pages 1818-1819

  Hosomi, Hiroyuki ^a   Ohba, Shigeru ^a   Tanaka, Koichi ^b   Toda, Fumio ^c  

^a KEIO UNIVERSITY   (Japan)

^b EHIME UNIVERSITY   (Japan)

^c OKAYAMA UNIVERSITY OF SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

ANILIDE; N METHYL N (METHYLMETHACRYLOYL)ANILIDE; UNCLASSIFIED DRUG;

CONFORMATION; CRYSTAL STRUCTURE; CYCLIZATION; LETTER; PHOTOCHEMISTRY; TEMPERATURE; X RAY CRYSTALLOGRAPHY;

EID: 0034050907     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja992437g     Document Type: Letter

References (16)

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13. The UV-vis spectra of the acetonitrile solution of I, which is deposited, show a strong π-π* absorption maximum at 199 nm with a weak n-π* absorption at around 250 nm. The absorption is negligible for wavelengths longer than 340 nm. The light from a ultrahigh-pressure Hg lamp has a main component at 365 nm in the region of wavelength longer than 340 nm. Therefore, a band-pass filter BP365 (T = 50% at 365 nm) was used for the incident light to penetrate a single crystal and to proceed with photoreaction homogeneously. If the band-pass filter was not used, the crystals degraded quickly.
14. -3, R = 0.068.
15. Positions of the C8*, C9*, C11*, C12*, C16*, and C17* atoms were located on difference syntheses and refined isotropically. The positions of hydrogen atoms and C18* were calculated geometrically and fixed.
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