Tetrahedron p. 9971 - 9978 (1996)
Update date:2022-08-03
Topics:
Hirota, Kosaku
Sajiki, Hironao
Kubo, Keiko
Kido, Masaru
Nakagawa, Kazuyuki
Stable 6-amino-5-thioformyluracils 3a-e were synthesized starting from 6-amino-1,3-disubstituted uracils 1a-e in 23-98% yields. According to the X-ray crystal structure, although the thioaldehyde 3c possesses reasonable double-bond character of the C=S bond, the length of C=S bond of the thioaldehyde 3c is longer than those of the kinetically stabilized thioaldehydes due to the mesomeric effect of the 6-amino group.
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