An efficient synthesis of novel benzo[f]Chromeno[2,3-d]pyrimidine and unknown benzo[f]chromeno[2,3-d][1,2,4]triazolopyrimidine derivatives is described utilizing ethyl-2-amino-4-phenyl-4H-benzo[f]chromene-3-carboxylate as precursor via aza-Wittig reaction. The process proved to be simple, high-yielding, and efficient.

中文翻译：

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应用aza-Wittig反应高效合成多取代苯并[f]色并[2,3-d]嘧啶和苯并[f]色并[2,3-d][1,2,4]三唑并嘧啶衍生物

描述了利用乙基-2-氨基-新型苯并[f]色并[2,3-d]嘧啶和未知苯并[f]色并[2,3-d][1,2,4]三唑并嘧啶衍生物的有效合成4-苯基-4 H-苯并[f]色烯-3-羧酸酯作为前体，通过氮杂维蒂希反应。事实证明，该过程简单、高产且高效。