Allylcytisine as a convenient scaffold for the construction of the π,σ-coordination compound {Acyt(H+)}[Cu8{Acyt(H+)}Cl10] with the unusual anionic 1D-coordination polymer
Inversion of diastereoselectivity under high pressure conditions: Diels–Alder reactions of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide
作者:Inna P. Tsypysheva、Sophia S. Borisevich、Alexander N. Lobov、Alena V. Kovalskaya、Vadim V. Shamukaev、Rustam L. Safiullin、Sergey L. Khursan
DOI:10.1016/j.tetasy.2015.06.005
日期:2015.7
Diels–Alder adducts of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide were synthesized. The conditions of effective diastereodifferentiation were found: the thermal Diels–Alderreaction of 12-N-substituted derivatives of (−)-cytisine with N-phenylmaleimide leads to 3aS, 4R, 12aR, 12bS adducts, while under high pressure, adducts with 3aR, 4S, 12aS, 12bR configurations of new asymmetric
作者:T. V. Khakimova、O. A. Pukhlyakova、G. A. Shavaleeva、A. A. Fatykhov、E. V. Vasil'eva、L. V. Spirikhin
DOI:10.1023/a:1013778703658
日期:——
A series of new N-substituted cytisine derivatives was synthesized. The H-1 and (13) C NMR spectra of certain compounds exhibit a doubled set of signals. This is explained by formation of diastereomeric pairs in compounds containing an asymmetric center in the substituents. The signal splitting in -COHC=CHCO2H and HC=O (formyl) derivatives is explained by the existence of Z and E invertomers. Their stereochemical features are discussed. Amide conjugation is confirmed by temperature experiments.
Thionation of quinolizidine alkaloids and their derivatives via Lawesson’s reagent
作者:Alena V. Koval’skaya、Polina R. Petrova、Dmitry O. Tsypyshev、Alexander N. Lobov、Inna P. Tsypysheva
DOI:10.1080/14786419.2020.1868460
日期:2022.7.18
Abstract Direct thionation of quinolizidinealkaloids (-)-cytisine, methylcytisine, thermopsine and some of their carbonyl derivatives was realized. It was established that carrying out of the reaction in the boiling toluene with 0.5 eq. of Lawesson’s reagent (LR) is most effective for synthesis of thio analogues of methyl-, allyl-, benzylcytisine and thermopsine. It was found, that formation of thioamides
Allylcytisine as a convenient scaffold for the construction of the π,σ-coordination compound {Acyt(H+)}[Cu8{Acyt(H+)}Cl10] with the unusual anionic 1D-coordination polymer