کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5264537 | 1385259 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First synthesis of 5,8-dichloro-3-(2-pyridyl)benzo[e][1,2,4]triazines by reaction of 3,3,6,6-tetrachloro-1,2-cyclohexanedione with 2-pyridylamidrazones. Characterization of unexpected bishemiaminal intermediates
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: First synthesis of 5,8-dichloro-3-(2-pyridyl)benzo[e][1,2,4]triazines by reaction of 3,3,6,6-tetrachloro-1,2-cyclohexanedione with 2-pyridylamidrazones. Characterization of unexpected bishemiaminal intermediates First synthesis of 5,8-dichloro-3-(2-pyridyl)benzo[e][1,2,4]triazines by reaction of 3,3,6,6-tetrachloro-1,2-cyclohexanedione with 2-pyridylamidrazones. Characterization of unexpected bishemiaminal intermediates](/preview/png/5264537.png)
چکیده انگلیسی
A new approach to selected 1,2,4-benzotriazines has been developed. 3,3,6,6-Tetrachloro-1,2-cyclohexanedione reacted with 2-pyridylamidrazones to give unexpected isolable bishemiaminal intermediates instead of the corresponding ketodiazenes. Subsequent dehydration gave 5,5,8,8-tetrachloro-3-(2-pyridyl)-5,6,7,8-tetrahydrobenzo[e][1,2,4]triazines, which were converted into previously unknown 5,8-dichloro-3-(2-pyridyl)benzo[e][1,2,4]triazines by dehydrochlorination under basic conditions. Severe limitations of reactions between o-benzoquinones with amidrazones have been circumvented in this manner. This preparative process has also been adapted to a one-pot protocol.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 54, Issue 12, 20 March 2013, Pages 1542-1545
Journal: Tetrahedron Letters - Volume 54, Issue 12, 20 March 2013, Pages 1542-1545
نویسندگان
Antonio Guirado, José I. López Sánchez, Rubén Moreno, Jesús Gálvez,