Results 81 to 90 of about 1,101 (192)
Synthesis of 2-halo-2H-azirines from phosphorus ylides [PDF]
, 1999 [alpha]-Oxophosphonium ylides (3a-3e) react with N-chlorosuccinimide and N-bromosuccinimide in the presence of azidotrimethylsilane giving the corresponding haloazidoalkenes (4a-4g) with elimination of triphenylphosphine oxide.
António M.d'A. Rocha Gonsalves +10 more
core +1 more source
Lewis Acid Mediated Alkylation and Diels-Alder Reactions of 2H-Azirines
, 2002 This thesis describes the use of 2H-azirines as reactivesubstrates in Lewis acid catalysed nucleophilic additions andin the Diels-Alder reaction.A number of carbon nucleophiles have been added to aseries of 2H-azirines in the presence and absence ofBF3 ...
Risberg, Erik
core
Iron-catalyzed three-component reaction: Synthesis of fluoroalkylated 2 h-azirines
A convenient route for the synthesis of fluoroalkylated 2H-azirines has been developed, involving an iron-catalyzed azidoperfluoroalkylation of alkynes with perfluoroalkyl iodides and trimethylsilyl azide.
Ramkumar N. +2 more
core +1 more source
Photochemically Induced 1,3-Dipolar Cycloadditions of 3-Amino-2H-azirines
, 1980 Irradiation of 3-(N-methylanilino)-2H-azirines in dimethoxyethane solution in the presence of dipolarophiles leads to five-membered heterocycles in 40-60% yield.
Stegmann, werner +2 more
core +1 more source
A Review on the Photochemistry of 2H-Azirines [PDF]
HETEROCYCLES, 1977 Gilgen, Paul +3 more
openaire +2 more sources
Lewis Acid Mediated Alkylation and Diels-Alder Reactions of 2H-Azirines [Elektronisk resurs]
, 2002 This thesis describes the use of 2H-azirines as reactivesubstrates in Lewis acid catalysed nucleophilic additions andin the Diels-Alder reaction.A number of carbon nucleophiles have been added to aseries of 2H-azirines in the presence and absence ofBF3 ...
Risberg, Erik,
core
, 2016 2H-azirines can serve as three-atom synthons by C-C bond cleavage, however, it involves a high energy barrier under thermal conditions (> 50.0 kcalmol (1)). Reported is a ruthenium-catalyzed [3+2+2] cycloaddition reaction of 2H-azirines with diynes, thus
Wan, Boshun +4 more
core +1 more source
, 2016 Ar matrix photolysis of 1- and 2-naphthyl azides 3 and 4 at 313 nm initially affords the singlet naphthyl nitrenes, 11 and 12. Relaxation to the corresponding lower energy, persistent triplet nitrenes 31 and 32 competes with cyclization to the azirines ...
Alexander Maltsev (2693116) +6 more
core +1 more source
Selective Synthesis of N‑Unsubstituted and N‑Arylindoles by the Reaction of Arynes with Azirines
, 2016 The transition-metal-free and temperature-dependent highly selective reaction of arynes with 2H-azirines allowing the synthesis of either N-unsubstituted or N-arylindoles has been developed.
Manikandan Thangaraj (1784476) +4 more
core +1 more source
, 1992 Reaction of diphenyl phosphorochloridate with amide enolates and subsequent treatment with NaN3 leads to 2-monosubstituted 3-amino-2H-azirines 5 in moderate yields.
Heinz Heimgartner +3 more
core +1 more source