109433-15-0Relevant articles and documents
Bench-Stable Nickel Precatalysts with Heck-type Activation
Weber, Jessica M.,Longstreet, Ashley R.,Jamison, Timothy F.
supporting information, p. 2716 - 2722 (2018/09/10)
Herein, we report the synthesis and characterization of a new class of air- and moisture-stable phosphine-containing nickel(II) precatalysts, which activate through a Heck-type mechanism. The activities of the precatalysts are demonstrated with a carbonyl
Stannylated Vinylic addition polynorbornene: Probing a reagent for friendly tin-mediated radical processes
García-Loma, Rodrigo,Alb é Niz, Ana C.
supporting information, p. 4247 - 4254 (2018/08/24)
Vinylic addition polynorbornenes (VA-PNB) with stannyl functional groups have been prepared and used in tinmediated radical dehalogenation reactions. The aliphatic and robust scaffold of VA-PNB is well suited for a support in radical processes. VA-PNB-(CH2)nSnHBu2 can be used as a stoichiometric reagent and VA-PNB-(CH2)nSnBu2Cl as a catalyst in the presence of a hydride donor for the reduction of RBr. The mixture KF (aq.)/polymethylhydrosiloxane (PMHS) is the most convenient hydride source to generate VA-PNB-(CH2)nSnHBu2 in situ. Al-though quite popular in this context, boron hydrides, being a source of radicals themselves, are not adequate to correctly evaluate the performance of the anchored organotin group. VAPNB-(CH2)4SnBu2Cl can be recycled and, even if it loses activity upon reuse, it is still useful after ten cycles. The stannylated VAPNB can be separated from the products by simple filtration, and it leads to very low tin contamination (at least 250 times lower than that with use of conventional separation methods).
Pd-catalysed domino arylation/CH activation for the synthesis of acenaphthylenes
Tietze, Lutz F.,Lotz, Florian
, p. 4676 - 4684 (2007/10/03)
The palladium-catalysed domino cyclisation of the aryl bromides 4, containing an alkyne and a bromonaphthyl moiety, leads to tetracycles of type 5 in good yields. The substrates 4 are easily accessible by addition of the corresponding lithiated alkynes 7