Ethyl azol-2-ylglyoxylates react smoothly with acetone in the presence of catalytic amounts of proline and trifluoroacetic acid to give the corresponding azolyl aldols in 93-98% yield. The products are easily transformed into azolyl pyridazinones in 85-98% yield by cyclization with hydrazine hydrate.
唑-2-基
乙醛酸乙酯在催化量的脯
氨酸和
三氟乙酸存在下与
丙酮顺利反应,生成相应的唑基醛醇,产率 93-98%。通过与
水合
肼环化,产物很容易转化为唑基
哒嗪酮,收率85-98%。