1208119-75-8Relevant academic research and scientific papers
A heterogeneous gold(I)-catalyzed ring expansion of unactivated alkynylcyclopropanes with sulfonamides leading to (E)-2-alkylidenecyclobutanamines
Yi, Feiyan,Huang, Bin,Nie, Quan,Cai, Mingzhong
, p. 4405 - 4410 (2016/09/13)
A heterogeneous gold(I)-catalyzed ring expansion of unactivated alkynylcyclopropanes was achieved in 1,2-dichloroethane at 100?°C in the presence of sulfonamides by using a magnetic nanoparticle-supported phosphine gold(I) complex [Fe3O4@SiO2-P-AuOTf] as catalyst, yielding a variety of (E)-2-alkylidenecyclobutanamines in moderate to high yields. The new heterogeneous gold catalyst can easily be separated from the reaction mixture by applying an external magnet and recycled at least 10 times without a significant loss of activity.
Gold(l)-catalyzed ring expansions of unactivated alkynylcyclopropanes to (E)-2-alkylidenecyclobutanamines in the presence of sulfonamides
Ye, Siyu,Yu, Zhi-Xiang
supporting information; experimental part, p. 804 - 807 (2010/04/06)
(Chemical Equation Presented) The ring expansion of cyclopropane derivatives provides a powerful method to construct synthetically useful four-membered carbocycles. Herein, a new type of gold(l)-catalyzed ring expansion of an unactivated alkynylcyclopropane/sulfonamide trapping strategy to (E)-2-alkylidenecyclobutanamines was described. The reaction tolerates a range of aryl and alkyl substituents with moderate to good yields.
