3,4-Dihydro-2-methyl-3-oxo-2-1,4-benzothiazines (1) give erythro-stereoselective aldol condensation. The stereochemistry was determined by single crystal X-ray diffraction. The aldol condensation takes place under kinetic control. The reasons for the observed stereoselectivity are discussed.
3,4-二氢-2-甲基-3-氧代-2 -1,4-苯并
噻嗪(1)产生赤型-立体选择性醛醇缩合。立体
化学通过单晶X射线衍射测定。羟醛缩合在动力学控制下发生。讨论了观察到的立体选择性的原因。