A DABCO-catalyzed (3 + 3) annulation between 2-(acetoxymethyl)buta-2,3-dienoate and sulfur ylides has been developed, which provides a facile method for the synthesis of 4H-pyrans bearing a vinyl sulfide group.
开发了一种以
DABCO为催化剂的(3 + 3)环化反应,该反应以2-(乙酰氧基甲基)丁-2,3-二烯酸酯和
硫亚胺为反应物,提供了一种合成含有
乙烯基硫化物的4H-
呋喃的简便方法。