Pichler, Herbert; Folkers, Gerd; Roth, Hermann J., Liebigs Annalen der Chemie, 1986, # 9, p. 1485 - 1505
作者:Pichler, Herbert、Folkers, Gerd、Roth, Hermann J.、Eger, Kurt
DOI:——
日期:——
A One-Step Ring Transformation/Ring Annulation Approach to Pyrrolo[2,3-d]pyrimidines. A New Synthesis of the Potent Dihydrofolate Reductase Inhibitor TNP-351
作者:Edward C. Taylor、Hemantkumar H. Patel、Jong-Gab Jun
DOI:10.1021/jo00126a017
日期:1995.10
Condensation of amidines with 2-amino-3-cyanofurans gives 2-substituted-4-aminopyrrolo[2,3-d]-pyrimidines by a ring-opening, ring-recyclization sequence of reactions through which the starting furan 2-amino nitrogen becomes the pyrrole nitrogen of the final product and one of the amidine nitrogens becomes N-1 of the fused pyrimidine ring. 2,4-Diamino-5-[2-(4-carbethoxyphenyl)ethyl]- pyrrolo[2,3-d]pyrimidine, a key intermediate in the synthesis of the DHFR inhibitor TNP-351, has been prepared in one step by reaction of ethyl 4-[2-(2-amino-3-cyanofuran-4-yl)ethyl]be with guanidine.
PICHLER H.; FOLKERS G.; ROTH H. J.; EGER K., LIEBIGS ANN. CHEM.,(1986) N 9, 1485-1505