Concepedia

Ring Transformation Reactions, I. Conversion of 6‐Aryl‐4‐(methylthio)‐2‐oxo‐2<i>H</i>‐pyran‐3‐carbonitriles to pyrazoles

Vishnu Ji Ram, Monika Verma, F. A. HUSSAINI, Aboo Shoeb

Liebigs Annalen der Chemie · 1991 · 48 citations · 3 references

DOI

Concepts

Abstract

Abstract A new ring transformation reaction has been studied by treating 6‐ or 5,6‐disubstituted 4‐(methylthio)‐2‐oxo‐2 H ‐pyran‐3‐carbonitriles 2 with hydrazine and methylhydrazine leading to polysubstituted pyrazoles 4, 5, 6 .

References

3

Synthesis and reactions of 6-aryl- and 6-styryl-3-cyano-4-methylthio-2H-pyran-2-ones.

Yoshinori Tominaga, A. USHIROGOCHI, Yoshiro Matsuda et al. · Chemical and Pharmaceutical Bulletin · 1984 · 73 citations · Full text

, , +6

The configuration of nicotine. A nuclear magnetic resonance study

Jerry F. Whidby, Jeffrey I. Seeman · The Journal of Organic Chemistry · 1976 · 39 citations

, , +5

Nuclear magnetic resonance spectra of cyclic amines. Shielding of .alpha. protons trans to a lone pair and cis to an N-methyl group in pyrrolidines

Eli Breuer, David Melumad · The Journal of Organic Chemistry · 1973 · 26 citations

, , +9