80737-89-9Relevant academic research and scientific papers
Continuous Flow Synthesis of 2H-Thiopyrans via thia-Diels–Alder Reactions of Photochemically Generated Thioaldehydes
Sachse, Florian,Gebauer, Konrad,Schneider, Christoph
, p. 64 - 71 (2020/11/30)
Herein, we report a novel protocol for the photochemical generation of thioaldehydes in a continuous flow process which were in situ reacted with electron rich 1,3-butadienes in thia-Diels–Alder reactions. A broad range of 3,6-dihydro-2H-thiopyrans were formed as products in much higher yields and productivities as compared to classical batch processes. Moreover, greatly reduced reaction times and a facile large-scale preparation of products were achieved by fully exploiting the advantages of continuous flow technology.
Thioaldehyde Diels-Alder Reactions
Vedejs, E.,Eberlein, T. H.,Mazur, D. J.,McClure, C. K.,Perry, D. A.,et al.
, p. 1556 - 1562 (2007/10/02)
Thioaldehydes containing virtually any α-substitutent can be generated by photofragmentation of phenacyl sulfides.Donor-substituted derivatives are reactive toward electron-rich dienes and give 2 + 4 cycloadducts with regiochemistry corresponding to advan
