Results 191 to 200 of about 2,292 (253)

Oxazolones; Part III. Reaction of 5(4H)-Oxazolones with Hydrazonoyl Halides: A New Synthesis of 5-Pyrazolones

open access: goldHETEROCYCLES, 1988
Reaction de la p-methoxyphenyl-2 phenyl-4 oxazoline-2one-5 avec les [N-aryl chloro] formohydrazonoyl formiate d'alkyle: obtention d'aryl-1 p-methoxybenzamido-4 oxo-5 phenyl-4 pyrazoline-2carboxylates-3 principalement et des esters d'alkyle et [aryl-2' (p-methoxyphenyl-2 phenyl-4 oxazolyl-5)-2'] hydrazides de l'acide oxalique et de derives de ...
F. Clerici   +4 more
openaire   +3 more sources

Site selectivity in reactions of hydrazonoyl halides with ketene-N,S-acetals

open access: closedJournal of Sulfur Chemistry, 2008
Ketene-N,S-acetal 7 reacts with hydrazonoyl chloride 1 to afford 1,2,4-triazoles 9. The formation of 9 indicates that 7 behaves mostly as N-nucleophile rather than 1,3-dipolarophile.
Mohie E. M. Zayed   +2 more
openaire   +3 more sources

ChemInform Abstract: Synthesis and Reactivity of 2‐(6,7‐Diethoxy‐3,4‐dihydroisoquinolin‐1‐yl)acetonitrile Towards Hydrazonoyl Halides.

open access: closedChemInform, 2001
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Awad, Enas M   +4 more
openaire   +5 more sources

SYNTHESIS AND REACTIONS OF PHOSPHINIMINES USING HYDRAZONOYL HALIDES [PDF]

open access: possibleOrganic Preparations and Procedures International, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Monther T. Fouad   +4 more
openaire   +2 more sources

Microwave‐Assisted Reaction of Hydrazonoyl Halides with Carbodithioic Acid Hydrazones. [PDF]

open access: possibleChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Sayed M. Riyadh, Hamad M. Al-Matar
openaire   +2 more sources
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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.
Abdelwahed R. Sayed   +3 more
openaire   +2 more sources

Reactions of hydrazonoyl halides with imidazoles and benzimidazoles

Journal of the Chemical Society, Perkin Transactions 1, 1979
Hydrazonoyl halides upon reaction with N-methylimidazole and N-substituted benzimidazoles yield ring opened 1 : 1 adducts. The action of aqueous sodium hydroxide on these adducts leads to the formation of pyrazin-2-one or quinoxalin-2-one derivatives via ring expansion.
Mariateresa Ioannisci   +2 more
openaire   +2 more sources

ChemInform Abstract: Regioselectivity in the Reactions of Bis‐hydrazonoyl Halides with Pyrimidine‐2‐thiones. [PDF]

open access: possibleChemInform, 2001
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Said M. El-Sheikh   +2 more
openaire   +2 more sources

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