Results 141 to 150 of about 39,725 (197)

Synthetic Methods and Pharmacological Potentials of Triazolothiadiazines: A Review. [PDF]

Molecules
Mostafa MS, Radini IAM, El-Rahman NMA, Khidre RE.   +3 more
europepmc   +1 more source

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Review of the synthesis and biological activity of hydrazonoyl halides

Synthetic Communications, 2020
This survey covers the literature data published on the chemistry of synthesis of hydrazonoyl halides within the past 20 years.
Sobhi M Gomha, Abdelwahed R Sayed, Yasair S Al-Faiyz   +2 more
exaly   +2 more sources

REACTION OF HYDRAZONOYL HALIDES WITH 2,4-DIOXOTETRAHYDROTHIAZOLE-5-THIOCARBOXANILIDES

Phosphorus, Sulfur and Silicon and the Related Elements, 1995
Abstract Reaction of 3-phenyl-2,4-dioxotetrahydrothiazole-5-thiocarboxanilides 3 with hydrazonoyl halides 4 in N,N-dimethylformamide in the presence of potassium hydroxide yielded the thiadiazoline derivatives 7 and 13. The mechanism of formation of the latter products is discussed.
Abdelgawad A Fahmi, Hyam A Abdelhadi
exaly   +2 more sources

Preparation of Novel Naphthyl Thiazoles from Hydrazonoyl Halides

Current Organic Synthesis
Introduction: In this article, we designate the hydrazonoyl halides and thiosemicarbazone employed in the synthesis of novel naphthyl thiazoles. Methods: Under reflux conditions and exclusion of water, thiosemicarbazone reacted with ...
Aisha M. Alateeq, Yasair S. Al-Faiyz, Ahmed A.M. El-Reedy, Olivia D. McNair, Jeffrey S. Wiggins, Abdelwahed R. Sayed   +5 more
openaire   +2 more sources

Reactions and Biological Activities of Hydrazonoyl Halides

Current Organic Synthesis
Abstract: This review covers the literature information on the chemistry of hydrazonoyl halides with different substrates to give heterocyclic compounds. From the foregoing survey, it seems this provides a useful and convenient strategy for the synthesis of numerous heterocyclic derivatives.
Jeffrey S Wiggins, Abdelwahed R Sayed, Yasair S Al-Faiyz   +2 more
exaly   +4 more sources

Studies on Organophosphorus Compounds XI: The Reaction of Phosphorus Reagents With Hydrazonoyl Halides, Hydrazonoyl Azides, and Shiff's Bases

Phosphorus, Sulfur and Silicon and the Related Elements, 2006
N-(chloro-furan-2-yl)methylene-N′-(4-nitrophenyl)hydrazone (I) reacted with triethylphosphite to produce the phosphonate derivative III. The tetrazine derivative VI was produced by the interaction of I with diethyl-phosphite. Hydrazonoyl azide derivatives VIIIa–c reacted with triphenyl phosphine to form the iminophosphorane derivatives Xa–c.
Nadia R Mohamed
exaly   +2 more sources

The Chemistry of Heterocyclic Hydrazonoyl Halides

, 1995
Publisher Summary Hydrazonoyl halides have emerged as an important class of intermediates, particularly for the synthesis of heterocyclic compounds. This chapter discusses the synthesis, properties, and reactions of Hydrazonoyl Halides. The mechanisms of some of the reactions and the structures of some of the products are outlined.
Ahmad Sami Shawali, Magda Ahmad Abdallah
openaire   +2 more sources

A new efficient synthesis of pyrazoles from hydrazonoyl halides and β-oxophosphonates

Tetrahedron Letters, 2014
Abstract A new practical and efficient synthesis of 1,3,5-trisubstituted pyrazoles has been developed by reacting of hydrazonoyl halides with β-oxophosphonates under mild conditions in good yields with excellent regioselectivity. This process employs an addition–elimination sequence. Wide scope, functional group compatibility has been established.
Ye Jia-Hai, Wenchao Zhang, Haitao Yu
exaly   +2 more sources

Synthesis from Hydrazonoyl Halides

, 2005
K. Ostrowska, A. Kolasa
openaire   +2 more sources