Aroylation of Fused Pyrimidines; Synthesis of 4-Aroylfuro[2,3-d]-, 4-Aroylthieno[2,3-d]-, and 4-Aroylisoxazolo[5,4-d]pyrimidines
摘要:
4-Aroylfuro[2,3-d]-(4), 4-aroylthieno[2,3-d]-(7 and 8), and 4-aroylisoxazolo[5,4-d]pyrimidines (13) were synthesized by aroylation of the fused chloro-(3a and 12) or bromopyrimidines (3b, 5, and 6) with arenecarbaldehydes (2) catalyzed by an imidazolium salt (1a). The fused aroylpyrimidines (4 and 7) were also synthesized by oxidative decyanation of alpha-phenylheteroareneacetonitriles (10 and 11).
Aroylation of Fused Pyrimidines; Synthesis of 4-Aroylfuro[2,3-d]-, 4-Aroylthieno[2,3-d]-, and 4-Aroylisoxazolo[5,4-d]pyrimidines
摘要:
4-Aroylfuro[2,3-d]-(4), 4-aroylthieno[2,3-d]-(7 and 8), and 4-aroylisoxazolo[5,4-d]pyrimidines (13) were synthesized by aroylation of the fused chloro-(3a and 12) or bromopyrimidines (3b, 5, and 6) with arenecarbaldehydes (2) catalyzed by an imidazolium salt (1a). The fused aroylpyrimidines (4 and 7) were also synthesized by oxidative decyanation of alpha-phenylheteroareneacetonitriles (10 and 11).
Several heteroarenecarbonitriles were prepared by reaction of haloheteroarenes with potassium cyanide catalyzed by sodium p-toluenesulfinate (1) or sodium methanesulfinate (2). In the reaction pathway, the cyanation proceeds through the formation of the sulfonylheteroarenes.
Aroylation of Fused Pyrimidines; Synthesis of 4-Aroylfuro[2,3-d]-, 4-Aroylthieno[2,3-d]-, and 4-Aroylisoxazolo[5,4-d]pyrimidines
4-Aroylfuro[2,3-d]-(4), 4-aroylthieno[2,3-d]-(7 and 8), and 4-aroylisoxazolo[5,4-d]pyrimidines (13) were synthesized by aroylation of the fused chloro-(3a and 12) or bromopyrimidines (3b, 5, and 6) with arenecarbaldehydes (2) catalyzed by an imidazolium salt (1a). The fused aroylpyrimidines (4 and 7) were also synthesized by oxidative decyanation of alpha-phenylheteroareneacetonitriles (10 and 11).