18709-45-0Relevant articles and documents
A novel approach to 5: H -pyrazino[2,3- b] indoles via annulation of 3-diazoindolin-2-imines with 2 H -azirines or 5-alkoxyisoxazoles under Rh(II) catalysis
Ruvinskaya, Julia O.,Rostovskii, Nikolai V.,Filippov, Ilya P.,Khlebnikov, Alexander F.,Novikov, Mikhail S.
, p. 38 - 42 (2017)
A novel one-step method for the preparation of 5H-pyrazino[2,3-b]indoles with different substitution patterns in all rings of the tricyclic system via the Rh2(OAc)4-catalyzed reaction of 2H-azirines with 3-diazoindolin-2-imines is reported. Alkyl 5H-pyrazino[2,3-b]indole-3-carboxylates were also prepared by a one-pot procedure from synthetic equivalents of alkyl 2H-azirine-2-carboxylates, 5-alkoxyisoxazoles. The reactions provide the first examples of the use of Rh(ii) catalysis for intermolecular annulations with 2H-azirines and isoxazoles.
Nucleophile-Induced Rearrangement of 2 H-Azirine-2-carbonyl Azides to 2-(1 H-Tetrazol-1-yl)acetic Acid Derivatives
Efimenko, Nikita I.,Khlebnikov, Alexander F.,Novikov, Mikhail S.,Spiridonova, Dar'ya V.,Tomashenko, Olesya A.
supporting information, p. 6362 - 6366 (2021/09/02)
2H-Azirine-2-carbonyl azides undergo a rearrangement into derivatives of 2-(1H-tetrazol-1-yl)acetic acid when interacting with O- and S-nucleophiles at room temperature. The reaction is catalyzed by tertiary amines or hydrazoic acid. The reaction with primary alcohols and phenols gives alkyl/aryl 2-(1H-tetrazol-1-yl)acetates. Thiophenols react with 2H-azirine-2-carbonyl azides to afford S-aryl 2-(1H-tetrazol-1-yl)ethanethioates. The mechanism of the nucleophile-induced rearrangement of 2H-azirine-2-carbonyl azides is discussed on the basis of DFT calculations as well as kinetic and 15N labeling experiments.
An Azirine Strategy for the Synthesis of Alkyl 4-Amino-5-(trifluoromethyl)-1 H -pyrrole-2-carboxylates
Funt, Liya D.,Tomashenko, Olesya A.,Novikov, Mikhail S.,Khlebnikov, Alexander F.
, p. 4809 - 4822 (2018/12/13)
1-(3,3,3-Trifluoro-2,2-dihydroxypropyl)pyridin-1-ium bromide serves as a trifluoromethyl-containing building block for the preparation of trifluoromethyl-substituted aminopyrroles based on the 2 H -azirine ring expansion strategy. The primary products, 3-