The synthesis of 6-phenyl-atevirdine (17), a lipophilic derivative of the potent HIV-1 reverse transcriptase inhibitor atevirdine (1), is described. The title compound was prepared from dithioacetale 2 via keteneaminal 4 and the nitropyridine derivative 10. Unexpectedly, no anti HIV activity was observed for the novel atevirdine derivative 17. The key intermediates 6, 8 and 10 could also be prepared
Pyridinderivate aus 3-Chlor-2-propeniminiumsalzen und Enaminen
作者:Bernd Brinker、Dieter Heber
DOI:10.1002/ardp.19873200608
日期:——
Reaktionen der 3‐Chlor‐2‐propeniminiumsalze 1 führen in Abhängigkeit von der Struktur der Enamine 2, 3 und 21 entweder zu den 1,4‐Dihydropyridinen 8 und 9 oder zu einem Gemisch der isomeren 5‐ bzw. 7‐arylsubstituierten Pyrido[2,3‐d]pyrimidine 22 und 23, deren Struktur anhand der 1H‐NMR‐Spektren diskutiert wird.
The application of unsymmetrical vinylogous iminium salts and related synthons to the preparation of monosubstituted triazolo [1, 5-a]pyrimidines
作者:Scott A. Petrich、Zhenrong Qian、Lisa M. Santiago、John T. Gupton、James A. Sikorski
DOI:10.1016/s0040-4020(01)89564-8
日期:1994.1
The reaction of vinylogous iminiumsalts and related analogs with 3-amino-1,2,4-triazole to yield 7-substituted and 5-substituted triazolo [1,5-a]pyrimidines is described.
The title compounds were synthesized by reaction of nitroketene animals with beta-chlorovinylcarbonyl compounds. The chloromethylene malononitriles 1 react with nitromethylenimidazolin (2 a) and -benzimidazoles 2 b to yield the 8-nitro-2,3-dihydroimidazo[1,2-a]pyridines 3 and the 4-nitropyrido[1,2-a]-benzimidazoles 6, both containing an amino group. Analogously, from the special 3-chloro-2-propeniminium salt 7 and 2 a the imidazopyridine derivative 9 was formed. The 3-aryl-3-chloro-2-propeniminium salts 10 were converted into the nitro-dihydroimidazo[1,2-a]pyridines 11 and the pyrido[1,2-a]benzimidazole 12 containing the aryl group by reaction with 2 a and 2 b, respectively. The structures were investigated by 2-dimensional H-1/C-13-NMR-spectroscopy.