Convenient synthesis of 1,2,3,4‐tetrahydro‐pyrimidin‐5‐ylbenzoxazoles |
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Authors: | Myung Hee Jung Sung‐Won Choi Kui‐Woong Cho |
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Abstract: | 2‐Pyrimidin‐5‐ylbenzoxazoles 7 have been synthesized by condensation of 5‐pyrimidinecarboxaldehyde 4 with substituted aminophenols 5 followed by oxidative cyclization of the resulting Schiff's bases 6 with iodobenzene diacetate. Subsequent formation of methylpyrimidinium salts 8 and reduction thereafter afforded tetrahydropyrimidinylbenzoxazoles 10. This method has been utilized in the synthesis of M1 muscarinic agonist candidates. |
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