20577-26-8Relevant articles and documents
Application of 1,1-ADEQUATE, HMBC, and Density Functional Theory to Determine Regioselectivity in the Halogenation of Pyridine N-Oxides
Hwang, Tsang-Lin,Bartberger, Michael D.,Chen, Ying
, p. 1956 - 1959 (2016/06/01)
The 1,1-ADEQUATE spectrum clearly shows specific two-bond proton to carbon correlations to unequivocally distinguish the major and minor regioisomers of ortho-halogenated pyridines and to aid in assignment of the corresponding proton and carbon chemical shifts. M06-2X/6-31+G(d,p) free energies of the regioisomeric intermediates arising from deprotonation correctly predict the experimentally observed preference and thus can be used to tune the substituent pattern to yield a desired regiochemical outcome.
Highly Regioselective Halogenation of Pyridine N -Oxide: Practical Access to 2-Halo-Substituted Pyridines
Chen, Ying,Huang, Jinkun,Hwang, Tsang-Lin,Chen, Maosheng J.,Tedrow, Jason S.,Farrell, Robert P.,Bio, Matthew M.,Cui, Sheng
supporting information, p. 2948 - 2951 (2015/06/30)
A highly efficient and regioselective halogenation reaction of unsymmetrical pyridine N-oxide under mild conditions is described. The methodology provides a practical access to various 2-halo-substituted pyridines, which are pharmaceutically important intermediates.
Spiro compounds
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, (2008/06/13)
Compounds of the general formula (I): wherein Ar1represents optionally substituted aryl or heteroaryl; n represents 0 or 1; T, U, V, and W each independently represent nitrogen atom or optionally substituted methine group, where at least two of them represent the said methine group; X represents methine or hydroxy substituted methine; Y represents an optionally substituted imino or oxygen atom are described and claimed. These novel spiro compounds are useful as neuropeptide Y receptor antagonists and as agents for the treatment of various kinds of cardiovascular disorders, central nervous system disorders, metabolic diseases and the like.