A novel approach towards the synthesis of an oxazine scaffold using scandium trifluoromethanesulfonate catalysed N, O-acetal and olefin cyclisation sequence
作者:Tian-Yu Yang、Xuan Yang、Yu Cheng、Xue-ting Gao、Shu-Ming Fu、Tao Zhang、Zhen-Ting Du
DOI:10.1016/j.tetlet.2023.154614
日期:2023.7
A novel approach to [1,3]oxazin-1-ones from 1,1-disubstituted alkene and N,O-acetals through scandium trifluoromethanesulfonate as catalyst in dichloroethane at 60 °C. The structure of this product is easily accessible. This protocol merits several advantages, such as very gentle conditions, cheap starting materials, and high yields. Altogether, 22 cases were investigated, and all the products were
一种通过三氟甲磺酸钪作为催化剂在二氯乙烷中在 60 °C下从 1,1-二取代烯烃和 N,O-缩醛制备[1,3]恶嗪-1-酮的新方法。该产品的结构很容易理解。该协议具有多种优点,例如非常温和的条件、廉价的起始材料和高产率。共调查22例,所有产品均经光谱方法确认。对三种化合物进行了单晶衍射。还在几个案例中研究了非对映化学。