New pyrazolo[4′,3′:5,6]pyrido[2,3‐d]pyrimidines, with an associated spiro‐3,3′‐oxindole attachment, were prepared by three‐component combinations of 5,6‐dihydro‐4H‐pyrrolo[3,2,1‐ij]quinoline‐1,2‐dione with a pair of reactants chosen from a pyrazol‐5‐one, a pyrazole‐5‐amine, a barbituric acid, or a 6‐aminouracil.

中文翻译：

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新型螺合吡唑并[4'，3'：5,6]吡啶并[2,3-d]嘧啶的合成

新的吡唑并[4'，3'：5,6]吡啶基[2,3- d ]嘧啶具有相关的螺-3,3'-羟吲哚连接物，是通过5,6-二氢的三组分组合制备的4 H-吡咯并[3,2,1- ij ]喹啉1,2-二酮与一对反应物，选自吡唑-5-酮，吡唑-5-胺，巴比妥酸或6-氨基尿嘧啶。