Now for a surprising product, whose

Now for a surprising product, whose structure and stereochemistry can be determined by NMR. Normally, reaction of a symmetrical ketone such as acetone with an aromatic aldehyde and base gives a double aldol condensation product in good 体eld.
But in one particular case, the reaction between pentan一2-one and 4-chlorobenzaldehyde, a different product is formed. The mass spectrum shows that two alehydes have reacted with one ketone as usual, but that only one molecule of water has been lost.
Some of what we know about this compound is shown in the scheme

結果 (中文) 1:

现在令人惊讶的产品，其结构和立体化学可以确定由核磁共振。通常情况下，对称酮等芳香醛与丙酮反应好体eld 中给出了双羟醛缩合产物。但在一种特殊情况，pentan一2 一和 4-氯苯甲醛之间的反应，形成不同的产品。质谱显示两个 alehydes 有像往常一样，与一个酮反应，但只有一个分子的水已丢失。一些我们知道的关于这种化合物是该计划中所示

結果 (中文) 3:

现在，一个令人惊讶的产品，其结构和立体，可以通过核磁共振。通常，一个对称酮等芳香醛和丙酮为基础的双羟醛缩合产物在好体ELD反应。但在一个特定的情况下，一戊酮和4-氯苯甲醛之间的反应，形成不同的产品。质谱表明两alehydes有酮为通常的反应，但只有一个水分子已经失去。我们所知道的有关该化合物的一些显示在该计划中