<MultiModal>![NC1=CC(C2=CC=CC=C2)=NN1.O=C(C1=CC=CC=C1)[H].O=C1CC(C)(C)CC(C1)=O>>[A], reaction conditions: solvent CCO ($EtOH$), ultrasonication, rt, 30 min](/media/uploads/e5644b77-c686-4202-87e9-818dd3e0668f.png)</MultiModal>

Please select the structural formula of product $\mathbf{A}$ and determine whether it has enantiomers.
<MultiModal>![NC1=CC(C2=CC=CC=C2)=NN1.O=C(C1=CC=CC=C1)[H].O=C1CC(C)(C)CC(C1)=O>>[A]，反应条件为溶剂CCO（$EtOH$）, 超声, rt, 30 min](/media/uploads/e5644b77-c686-4202-87e9-818dd3e0668f.png)</MultiModal>

请选出产物$\mathbf{A}$的结构简式，并判断是否有对映异构体
<MultiModal>![O=C1C2=C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/956cdbf5-9128-47d4-a366-0458adefd5b2.png)</MultiModal>

Has enantiomers
<MultiModal>![O=C1C2=C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/956cdbf5-9128-47d4-a366-0458adefd5b2.png)</MultiModal>

No enantiomer
<MultiModal>![O=C1C2=C(NC(NN=C3C4=CC=CC=C4)=C3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/143873d3-1f8b-47e2-9ea0-70b2cdab6ee7.png)</MultiModal>

Has enantiomers
<MultiModal>![O=C1C2=C(NC(NN=C3C4=CC=CC=C4)=C3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/143873d3-1f8b-47e2-9ea0-70b2cdab6ee7.png)</MultiModal>

No enantiomer
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/672dbbdc-023b-4c96-b6a2-34d7d5a83548.png)</MultiModal>

Has enantiomers
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/672dbbdc-023b-4c96-b6a2-34d7d5a83548.png)</MultiModal>

No enantiomer
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/40a62df1-fecc-4628-9a4e-c0760b853bbe.png)</MultiModal>

Has enantiomers
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/40a62df1-fecc-4628-9a4e-c0760b853bbe.png)</MultiModal>

No enantiomer
<MultiModal>![O=C1C2=C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/956cdbf5-9128-47d4-a366-0458adefd5b2.png)</MultiModal>

有对映异构体
<MultiModal>![O=C1C2=C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/956cdbf5-9128-47d4-a366-0458adefd5b2.png)</MultiModal>

没有对映异构体
<MultiModal>![O=C1C2=C(NC(NN=C3C4=CC=CC=C4)=C3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/143873d3-1f8b-47e2-9ea0-70b2cdab6ee7.png)</MultiModal>

有对映异构体
<MultiModal>![O=C1C2=C(NC(NN=C3C4=CC=CC=C4)=C3C2C5=CC=CC=C5)CC(C)(C)C1](/media/uploads/143873d3-1f8b-47e2-9ea0-70b2cdab6ee7.png)</MultiModal>

没有对映异构体
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/672dbbdc-023b-4c96-b6a2-34d7d5a83548.png)</MultiModal>

有对映异构体
<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/672dbbdc-023b-4c96-b6a2-34d7d5a83548.png)</MultiModal>

没有对映异构体

<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/40a62df1-fecc-4628-9a4e-c0760b853bbe.png)</MultiModal>

有对映异构体

<MultiModal>![O=C1N2C3=C(C(C4=CC=CC=C4)=NN3)[C@@]([H])(C5=CC=CC=C5)C[C@]2(O)CC(C)(C)C1](/media/uploads/40a62df1-fecc-4628-9a4e-c0760b853bbe.png)</MultiModal>

没有对映异构体
Under ambient and neutral conditions, the reaction is kinetically controlled  

<Checkpoint>[Under ambient and neutral conditions, the reaction is kinetically controlled](1)</Checkpoint>  

The nucleophilic ability of the nitrogen atom's n-electrons is stronger than that of the π-electrons in a carbon-carbon double bond  

<Checkpoint>[The nucleophilic ability of the nitrogen atom's n-electrons is stronger than that of the π-electrons in a carbon-carbon double bond](1)</Checkpoint>  

First, a condensation reaction occurs via a mechanism similar to the Biginelli reaction to yield the intermediate  

<MultiModal>![O=C1C2C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)(O)CC(C)(C)C1](/media/uploads/1cee0af5-5338-45de-ba68-3012a82e4789.png)</MultiModal>  

<Checkpoint>[First, a condensation reaction occurs via a mechanism similar to the Biginelli reaction to yield the intermediate  <MultiModal>![O=C1C2C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)(O)CC(C)(C)C1](/media/uploads/1cee0af5-5338-45de-ba68-3012a82e4789.png)</MultiModal>](1)</Checkpoint>  

Subsequently, an elimination reaction occurs to remove a molecule of $H_2O$, yielding product $\mathbf{A}$
在常温和中性的条件下，反应受到动力学控制

<Checkpoint>[在常温和中性的条件下，反应受到动力学控制](1)</Checkpoint>

氮原子的n电子的亲核能力强于碳碳双键中π电子的亲核能力

<Checkpoint>[氮原子的n电子的亲核能力强于碳碳双键中π电子的亲核能力](1)</Checkpoint>

首先通过类似Biginelli反应的机理，进行缩合反应得到中间体

<MultiModal>![O=C1C2C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)(O)CC(C)(C)C1](/media/uploads/1cee0af5-5338-45de-ba68-3012a82e4789.png)</MultiModal>

<Checkpoint>[首先通过类似Biginelli反应的机理，进行缩合反应得到中间体  <MultiModal>![O=C1C2C(NC3=CC(C4=CC=CC=C4)=NN3C2C5=CC=CC=C5)(O)CC(C)(C)C1](/media/uploads/1cee0af5-5338-45de-ba68-3012a82e4789.png)</MultiModal>](1)</Checkpoint>

接着发生消除反应脱去一分子$H_2O$得到产物$\mathbf{A}$