Results 41 to 50 of about 1,276 (179)

Addition and Cycloaddition Reactions of Phosphinyl- and Phosphonyl-2H-Azirines, Nitrosoalkenes and Azoalkenes

Molecules, 2009
An overview of the use of 2H-azirines, conjugated nitrosoalkenes and conjugated azoalkenes bearing phosphorus substituents in addition and cycloaddition reactions is presented, focused on strategies for the synthesis of aminophosphonate and ...
Américo Lemos
doaj   +1 more source

A Novel Approach to Substituted 2H-Azirines

, 2016
2-(Benzotriazol-1-yl)-2H-azirines 4a−c, obtained by treatment of oximes 2a−c with tosyl chloride and aqueous KOH, were reacted with benzylmagnesium bromide or 4-methylbenzylmagnesium bromide in the presence of zinc chloride to give 2-benzyl-2H-azirines ...
Hongfang Yang (1370343), Chavon R. Wilkerson (2706808), Alan R. Katritzky (455231), Mingyi Wang (91634)   +3 more
core   +1 more source

Synthesis of polyhydroxylated 2h-azirines and 2-halo-2h-azirines from 3-azido-2,3-dideoxyhexopyranoses by alkoxyl radical fragmentation

, 2008
The reaction of 3-azido-2,3-dideoxypyranose and 3-azido-2,3-dideoxy-2-halohexopyranose compounds with (diacetoxyiodo)benzene and iodine generated 2-azido-1,2-dideoxy-1-iodoalditols and 2-azido-1,2-dideoxy-1-halo-1-iodoalditols, respectively.
Suarez, E., Kennedy, A.R., Rodriguez, M.S., Alonso-Cruz, C.R.   +3 more
core   +4 more sources

Facile Synthesis of 2-Dimethylamino-Δ-1-Azirine Derivatives by Thermal or Photo-Isomerization of Isoxazoles [1]

CHIMIA, 1976
3,5-Bisdimethylamino-isoxazoles II are obtained easily from 1,3-dichloro-trimethinecyanine I and a water solution of hydroxylamine. Besides precedented photo-isomerization of 4-substituted isoxazoles IIb,c to azirines IIIb,c near quantitative thermal ...
G.J. de Voghel, T.L. Eggerichs, Brigitte Clamot, H.G. Viehe   +3 more
doaj   +1 more source

Stabile Zink-Komplexe von 3-Amino-2H-azirinen

CHIMIA, 1978
3-Dimethylamino-2,2-dimethyl-2H-azirine (4a), which is known to react easily with Brönsted acids and electrophiles, forms a stable complex 5a with ZnBr2. In contrast to all other reactions of 4a, the three-membered ring in this complex is preserved. The
Kurt Dietliker, Ursula Schmid, Gabriele Mukherjee-Müller, Heinz Heimgartner   +3 more
doaj   +1 more source

Photochemistry of N‐Phenyl Benzonaphthothiophene and Dinaphthothiophene Sulfoximines

European Journal of Organic Chemistry, EarlyView.
The sequential photorelease of nitrenes and atomic oxygen [O(3P)] from N‑phenyl benzonaphthothiophene and dinaphthothiophene sulfoximines is a rare photochemical phenomenon in which two reactive intermediates can be released from a single chromophore. The sequential photorelease of nitrenes and atomic oxygen [O(3P)] is a rare photochemical phenomenon ...
Henry J. Politte, Bashar Aziz, Riley J. N. Tharp, Ryan D. McCulla   +3 more
wiley   +1 more source

Neuere Methoden zur Ringerweiterung organischer Verbindungen

CHIMIA, 1980
The actual interest in the construction of cyclic compounds via ring expansion reactions is demonstrated in the first chapter by means of typical examples.
Heinz Heimgartner
doaj   +1 more source

Hj‐aggregates of quinoline‐fused boron‐dipyrromethene nanoparticles for near‐infrared dualmodal photodynamic and photothermal therapy

Smart Molecules, EarlyView.
A novel quinoline‐fused cyclic pyrrole is synthesized via lithium diisopropylamide‐catalyzed [3 + 2] cyclization, enabling the construction of a symmetrical boron‐dipyrromethene photosensitizer that forms Hj‐aggregates upon nanoparticle encapsulation.
Bo Zhang, Chuang Du, Yuewen Yang, Dongping Xu, Xin‐Dong Jiang, Hui‐Xin Liu, Gaowu Qin   +6 more
wiley   +1 more source

The Neber approach to 2-(Tetrazol-5-yl)-2H-Azirines

, 2014
The synthesis of 2-(tetrazol-5-yl)-2H azirines is reported for the first time. Using the Neber approach, β-ketoxime-1H-tetrazoles were converted into the target 2Hazirines bearing phenyl, furan-2-yl, thiophen-2-yl, or pyrrol-2-yl substituents at C-3.
Gimeno, Lourdes, Melo, Teresa M. V. D. Pinho e, Cardoso, Ana Lúcia, Lemos, A., Palacios, Francisco   +4 more
core   +1 more source

Methyl (1aRS,7aSR)-7-formyl-1a-phenyl-1,1a-dihydroazirino[2,3-b]benzo[e][1,4]thiazine-7a(7H)-carboxylate

Molbank
The first representative of the aziridine-fused benzo[e][1,4]thiazine series was synthesized from methyl 2-bromo-2-phenyl-2H-azirine-2-carboxylate and benzo[d]thiazole in 74% yield.
Ilya P. Filippov, Anastasiya V. Agafonova, Nikolai V. Rostovskii, Mikhail S. Novikov   +3 more
doaj   +1 more source