The research is devoted to the study of unexpected products that formed as a result of the condensation reaction between 2-acetylpyridine and 2-formylpyridine under the Claisen-Schmidt reaction conditions. As a result. a sequence of reactions leading to the following compounds has been proposed: 1. 3-bis (pyridin-2-yl) prop-2-en-1-one (3); 1. https://foldlyers.shop/product-category/pnp/