Azetidine carboxylic acid esters are converted into enol silyl ethers which, as enamino ketene acetals, undergo ready oxidative cleavage of the ethylenically unsaturated double bond, e.g. by dye-sensitized photo-oxygenation, to form beta-lactams. The beta-lactams and substitution products thereof are useful intermediates in the synthesis of biologically active lactams.
氮杂
环戊酸酯被转化为烯醇
硅基醚,作为烯胺
酮酯,易于通过
染料敏化的光氧化反应裂解
乙烯基不饱和双键,例如形成β-内酰胺。β-内酰胺及其取代产物是合成
生物活性内酰胺的有用中间体。