It has been revealed for the first time that co-promoted by CuCl and NaH in the presence of molecular oxygen (air), the reaction of dicinnamoyl ketene dithioacetals as the acyclic C6 synthons with ethyl cyanoacetate gives functionalized seven-membered carbocycles. A mechanism is proposed involving a tandem Michael addition-intramolecular radical cyclization-benzyl C(sp(3))-H bond oxidation.
首次揭示了在分子氧(空气)存在下,由CuCl和NaH共同促进的,
二肉桂酰基烯酮二
硫缩醛作为无环C6合成子与
氰基
乙酸乙酯的反应生成了功能化的七元碳环。提出了一种机制,涉及串联迈克尔加成-分子内自由基环化-苄基C(sp(3))-H键氧化。