74889-36-4Relevant academic research and scientific papers
Regio-selective synthesis of novel 1-tert-butyl-4-nitro-1H-pyrrole-3-carboxylic acid building block
Nguyen, Duyan V.,Schiksnis, Robert A.,Michelotti, Enrique L.
, p. 6807 - 6809 (2009)
A convenient, regio-selective synthesis of novel 1-tert-butyl-4-nitro-1H-pyrrole-3-carboxylic acid was developed, utilizing the bulky tert-butyl moiety of 1-tert-butyl-1H-pyrrole to direct selective, un-symmetrical substitutions to the desired 3 and 4 pos
Products from N-Substituted Pyrroles and Trifluoroacetic Anhydride: Ratios and Conformations of Isomers
Chadwick, Derek J.,Meakins, G. Denis,Rhodes, Caroline A.
, p. 878 - 886 (2007/10/02)
A series of N-substituted pyrroles has been treated with trifluoroacetic anhydride.Small alkyl groups or aryl groups (as the N-substituents) lead exclusively, or almost exclusively, to the 2-trifluoroacetyl derivatives, bulky groups (notably 1-adamantyl) to the 3-derivatives, and those of intermediate size (such as i-propyl) to mixtures of isomers.N-Substituted 3-trifluoroacetylpyrroles exist in solution as mixtures of rotational isomers whereas the 2-isomers adopt a preferred conformation in which the nitrogen and oxygen atoms are in the syn orientation.
