1. Synthesis, mechanism of action, and QSAR of herbicidal 3-substituted-2-aryl-4,5,6,7-tetrahydroindazoles
2. Wolf, A. D. US Patent 4 059 434, 1977.
3. Wolf, A. D. US Patent 4 124 274, 1978.
4. To the best of our knowledge, the only precedent for the direct preparation of this type of 5-unsubstituted pyrazoles is: Noravyan, A. S.; Mambreyan, Sh. P.; Vartanyan, S. A. Chem. Abstr. 1978, 89, 6309. For structure determination, see: Bardon, L.; Elguero, J.; Jacquier, R. Bull. Soc. Chim. Fr. 1967, 1, 289–294. For an example of reverse selectivity due to steric hindrance, see: Xenos, C. D.; Catsoulacos, P. Synthesis 1985, 3, 307–309.