The steric course of the photocyclization reaction of the title achiral compounds (1) to optically active trans-dihydrofuran derivatives (2) was controlled by carrying out the reaction in inclusion crystals (4) with optically active hosts (3) derived from tartaric acid. The mechanism of the enantioselective reaction of 1 in 4 was studied by X-ray structural analysis of 4. In some cases, the steric
标题非手性化合物(1)与旋光的反式二氢
呋喃衍
生物(2)的光环化反应的空间过程通过在包含晶体(4)中与衍生自
酒石酸的旋光性主体(3)中进行反应来控制。通过对4的X射线结构分析研究了1对4的对映选择性反应的机理。在某些情况下,光反应的空间过程会有所不同,具体取决于4是通过重结晶还是通过将1和3混合来制备。