- A facile synthesis of N-arylcyanoformamidoximes, 4-aryl-3-cyano-1,2,4- oxadiazin-5(6H)-ones, 2-cyanoquinazolin-3-oxides, and 2-cyanoquinazolines via 5-arylimino-4-chloro-5H-1,2,3-dithiazoles
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The reaction of 5-arylimino-4-chloro-5H-1,2,3-dithiazoles with hydroxylamine hydrochloride in pyridine at room temperature gave N- arylcyanoformamidoximes, which were utilized as starting materials for the synthesis of 4-alkyl- (or aryl)-2-cyanoquinazolines and 4-aryl-3-cyano-1,2,4- oxadiazin-5(6H)-ones.
- Chang, Yong-Goo,Kim, Kyongtae
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p. 2653 - 2666
(2007/10/03)
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- PREPARATION OF HETEROARENECARBONITRILES BY REACTION OF HETEROARENE N-OXIDES WITH TRIMETHYLSILYL CYANIDE IN THE PRESENCE OF DBU
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Several heteroarenecarbonitriles were prepared from the corresponding heteroarene N-oxides by treatment with trimethylsilylcyanide (TMSCN) in the presence of a base in tetrahydrofuran (THF). 1,8-Diazabicyclo-7-undecene (DBU) was found to be an effective base for the cyanation.
- Miyashita, Akira,Kawashima, Touru,Iijima, Chihoko,Higashino, Takeo
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p. 211 - 218
(2007/10/02)
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- HAMMETT-TAFT CONSTANTS OF SUBSTITUTED 2- AND 4-QUINAZOLINYL GROUPS
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From the chemical shifts of the meta- and para-carbon atoms of the phenyl group in phenylquinazolines the ?I and ?R0 constants of 2- and 4-quinazolinyl groups were determined.Correlation equations which enable us to calcul
- Baram, S. G.,Shkurko, O. P.,Mamaev, V. P.
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p. 601 - 605
(2007/10/02)
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