作者:Piotr Aleksandrowicz、Hanna Piotrowska、Wojciech Sas
DOI:10.1016/0040-4020(82)85120-x
日期:1982.1
study of palladium catalyzed C-allylation of aliphatic nitrocompounds is described. Allylic alcohols and/or their acetates and allyl phenyl ethers were employed as allylating agents. The dependence of the reaction yield on nature and quantity of base and structure of the allylic unit is reported and explained. The lowest yield was obtained for allyl alcohol; however it could be considerably increased
[1,4]-sigmatropic rearrangement of chiral nitrones and their utilization in the synthesis of new iminosugars
作者:Maciej Malinowski、Tomasz Rowicki、Patrycja Guzik、Maciej Gryszel、Sebastian Łapczyński、Monika Wielechowska、Karolina Czerwińska、Izabela Madura、Wojciech Sas
DOI:10.1039/c5ob01432h
日期:——
α-stereocenter of sugar nitrones leads to the conclusion that the process may occur through [1,4]-sigmatropic rearrangement. Participation of an ionic mechanism was excluded by a deuterium labeling experiment, and DFT calculations showed a reasonable energy barrier for the proposed [1,4]-shift. Products of the intramolecular 1,3-dipolar cycloaddition of the studied nitrones were utilized in the diversity-oriented