Synthesis of isomeric 1,1'-phenylene-bis(6-azauracil-5-carbonitriles)
1990 ◽
Vol 55
(12)
◽
pp. 2967-2976
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The described synthesis of all three isomeric 1,1'-phenylene-bis(6-azauracil-5-carbonitriles) IVa-IVc starts from the respective 1-nitrophenyl-6-azauracil-5-carbonitriles Ia-Ic which were reduced to the corresponding amino derivatives IIa-IIc, diazotized, and coupled with ethyl cyanoacetylcarbamate to give the isomeric hydrazones IIIa-IIIc which were finally cyclized to the title compounds containing two 6-azauracil rings. A general formula is presented for calculation of mutual distance of arbitrary atoms in any planar molecules.
1931 ◽
Vol 108
(755)
◽
pp. 130-137
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Keyword(s):
1992 ◽
Vol 50
(1)
◽
pp. 366-367
Keyword(s):
Keyword(s):
1985 ◽
Vol 20
(2)
◽
pp. 36-43
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2019 ◽
Vol 19
(13)
◽
pp. 1093-1110
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1994 ◽
Vol 59
(9)
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pp. 2123-2126
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