Synthesis of pyrazoles and condensed pyrazoles

Abstract

This review introduces the synthesis of various pyrazoles reported by us and some other research groups during 1989–1998. Some of papers in this review deal with the development of potent pyrazoles or with the synthesis of potential pyrazoles aiming at agrochemicals and/or drugs.

Five‐Membered Heterocycles: 1,2‐Azoles. Part 1. Pyrazoles

“…The synthesis and chemistry of pyrazoles has been the subject of recent reviews [6,8,[81][82][83][84]. [85,86] and N-bromoacetamide [87][88][89].…”

Green synthesis of pyrazole systems under solvent-free conditions

“…In most of these methods, diverse organic solvents such as ethanol, toluene, CH 2 Cl 2 , acetone and acetonitrile have been used (22)(23)(24)(25)(26)(27)(28)(29)(30)(31). The obtained product yields of most of these reactions are significant, but the solvents used are not compatible with the environment or cost savings.…”

N1‐allyl‐3‐substituted‐6,7‐dimethyl‐1,2‐dihydro‐2‐quinoxalinone as key intermediate for new acyclonucleosides and their regioisomer O‐analogues

“…They also find considerable application as angiotensin II receptor antagonists [14], NMDA antagonists [15], anti-inflammatory [16], antidepressanttranquilizing agents [17], and antitumor drugs [18,19]. El Ashry et al [7] described the synthesis of some homoacyclovir analogues of 2-(1H)-quinoxalinone bases and their activity against Hepatitis B virus (HBV).…”