An efficient photolabileprotectinggroup, thiochromone S,S-dioxides with the diazomethyl group for phosphate derivatives, amino acids and sulfonic acids was developed. Protection and photodeprotection reactions proceeded smoothly under mild conditions without any catalyst. 1H NMR and HPLC spectra studies demonstrated the photolysis properties of the photolabileprotectinggroup and gave an exact quantification
开发了一种有效的光不稳定保护基,硫杂色酮S,具有重氮甲基的二氧化物,可用于磷酸盐衍生物,氨基酸和磺酸。保护和光脱保护反应在温和条件下顺利进行,没有任何催化剂。1 H NMR和HPLC光谱研究证明了光不稳定保护基的光解特性,并对释放的底物进行了精确定量。特别地,Paternò–Büchi型光环加成反应后衍生自噻吩酮的光产物显示出高荧光强度。该荧光特性表明光脱保护的进展也可以通过荧光光谱监测。
An alternative and simple method to prepare hetarenoindanone via intramolecular cyclization has been studied. This reaction represents the first example of an intramolecular Friedel-Crafts reaction-oxidation cascade promoted by selenium dioxide by way of Riley allylic oxidation.