94447-61-7Relevant articles and documents
An isoxazole strategy for the synthesis of alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylates - versatile building blocks for assembling pyrrolo-fused heterocycles
Agafonova, Anastasiya V.,Funt, Liya D.,Novikov, Mikhail S.,Khlebnikov, Alexander F.
, p. 1976 - 1984 (2021/03/16)
A full atom-economical domino method has been developed for the preparation of alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylates by transannulation of 5-alkoxyisoxazoles with malononitrile under Fe(ii) catalysis. Alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylates are excellent building blocks for various annulation reactions, leading to new derivatives of 1H-pyrrolo[1,2-a]imidazole and pyrrolo[2,3-d]pyrimidine. The DFT calculations of mechanistic details of alkyl 5-amino-4-cyano-1H-pyrrole-2-carboxylate formation are presented.
Easy Access to 2-Fluoro- And 2-Iodo-2 H -azirines via the Halex Reaction
Agafonova, Anastasiya V.,Khlebnikov, Alexander F.,Novikov, Mikhail S.,Rostovskii, Nikolai V.,Smetanin, Ilia A.
, p. 4582 - 4589 (2019/12/11)
A simple gram-scale method for the preparation of esters and dialkylamides of 2-(fluoro/iodo)-2 H -azirine-2-carboxylic acids via the halogen exchange (Halex) reaction of 2-bromo-substituted analogues is reported. The method operates with inexpensive and safe reagents, Bu 4 NF and potassium iodide, providing high product yields. Alternatively, 2-fluoro-2 H -azirine-2-carboxylates can be prepared from 2-iodo- and 2-chloro-analogues. The latter compounds can be obtained in practically quantitative yield by treating the 2-iodo- and 2-bromo-2 H -azirine-2-carboxylic esters with Bu 4 NCl.
SYNTHESIS AND NUCLEOPHILIC SUBSTITUTIONS OF 3-ALKYL-5-CHLOROISOXAZOLES
Stevens, R. V.,Albizati, K. F.
, p. 4587 - 4590 (2007/10/02)
A 3-alkyl-5-chloroisoxazole synthesis is described based on the cycloaddition of nitrile oxides to 1,1-dichloroethylene, an inexpensive dipolarophile.Substitution of the chloride in these adducts by various nucleophiles is also described.