are described. Substitution-induced changes to the sulfinyl group stereomutation and the ring conformation are investigated. The sulfoxides were configurationally stable at a wide thermal range, but underwent photocatalysed stereomutation at sulfur without concomitant isomerization at C-4. In almost all cases the trans isomer predominated at equilibrium. The theoretical studies are in close agreement
描述了一系列2,4,4,6-四取代-4 H-
硫代
吡喃-1-氧化物的立体
化学方面和光
化学。研究了亚砜基立体突变和环构象的取代诱导变化。亚砜在很宽的温度范围内都具有构型稳定性,但是在
硫上进行了光催化的立体突变,而在C-4上没有伴随的异构化。在几乎所有情况下,反式异构体均处于平衡状态。理论研究与实验结果非常吻合。