A metal/peroxide-free involved simple cascade 6-exo-trig spirocyclization of tert-butyl nitrite
with biaryl ynones has been finished, which resulted in various NO2-modified spiro [5, 5] …

While the radical spirocyclization of biaryl ynones for the construction of spiro [5.5] trienones
has been widely explored, we report in this work on a new N-centered radical initiated …

A three-component, metal-free radical cascade iodonitrosylative cyclization reaction was
described. The nitroso radical was generated from tert-butyl nitrite and triggered the radical …

Abstract A K2S2O8‐promoted nitration/spirocyclization of biaryl ynones using inexpensive
NaNO2 as nitro source has been described. This cascade reaction is triggered by nitration of …

Ceric ammonium nitrate (CAN)-promoted oxidative ipso-cyclization of unactivated biaryl
ynones with S-centered radicals (SCN/SCF3) to access spiro [5, 5] trienones has been …

A new pattern for nitrative cyclization of 1, 6-enynes with t-BuONO has been reported for the
synthesis of various 2-pyrrolidinone derivatives in 45–88% yields. This novel method is …

DTBP‐Mediated Cascade Spirocyclization and Dearomatization of Biaryl Ynones: Facile Access
to Spiro[5.5]trienones through C(sp3)−H Bond Functionalization - Zhang - 2021 - European …

A new method for the nitrative spirocyclization of alkynes is described. This method involves
the oxidative difunctionalization of alkynes initiated by a radical attack pathway using t …

Free radical three-component nitration/spirocyclization of unsaturated sulfonamides/amides
with tert-butyl nitrite was developed for the construction of diverse NO2-revised 4-azaspiro …

A novel and convenient metal-free nitration and cyclization of 1, 6-enynes has been
developed. Two C–C bonds and one C–N bond were constructed in one process in this …