Bicyclic Pyrrolidines for Medicinal Chemistry via [3 + 2]-Cycloaddition
作者:Vladimir I. Savych、Vladimir L. Mykhalchuk、Pavlo V. Melnychuk、Andrii O. Isakov、Taras Savchuk、Vadim M. Timoshenko、Sergiy A. Siry、Sergiy O. Pavlenko、Dmytro V. Kovalenko、Oleksandr V. Hryshchuk、Vitalii A. Reznik、Bohdan A. Chalyk、Vladimir S. Yarmolchuk、Eduard B. Rusanov、Pavel K. Mykhailiuk
DOI:10.1021/acs.joc.1c01327
日期:2021.10.1
A general approach to bicyclic fused pyrrolidines via [3 + 2]-cycloaddition between nonstabilized azomethyne ylide and endocyclic electron-deficient alkenes was elaborated. “Push–pull” alkenes and CF3-alkenes did not react with the azomethyne ylide under the previously reported conditions, and we developed a superior protocol (LiF, 140 °C, no solvent). Among obtained products were medchem-relevant
Synthesis of Monosubstituted Trifluoromethylated Derivatives of 2H-thiete, Dihydrothiophenes, and 2H-thiopyrans
作者:Serhii A. Siryi、Vadim М. Тimoshenko、Tymofii V. Rudenko、Yuriy M. Markitanov、Eduard B. Rusanov、Yuriy G. Shermolovich
DOI:10.1007/s10593-022-03063-0
日期:2022.2
Cyclic keto sulfides (thietan-3-one, tetrahydrothiophen-3-one, γ-thiobutyrolactone, δ-thiovalerolactone, thiopyran-3-one, and thiopyran-4-one) react with trifluoromethyltrimethylsilane (Ruppert–Prakash reagent) to afford trifluoromethyl-substituted hydroxysulfides which form monotrifluoromethyl-substituted cyclicunsaturatedsulfones via successive oxidation and dehydration reactions. It was shown