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Showing 1 to 7 of 7 for “"Hydrazine derivatives"”.
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A Study of the Chemistry of Thietan-3-Ones and Related Substances
The chemistry of some novel derivatives of thietan—3-ones has been studied. These thietanones have been prepared by the treatment of certain ketones with thionyl chloride in the presence or absence of pyridine. The stereochemistry of the thietanones was studied using nuclear magnetic resonance …
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New methods for synthesis and modification of peptides and proteins
… sequence tags reactive towards substituted hydrazine derivatives in a transpeptidation reaction. The discovered C-terminal tripeptide tag His-Gly-Cys underwent transpeptidation with a number of structurally different nucleophiles in various sequence contexts.
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Investigations of benzothienopyrans and related compounds
… 2-alkenoyl-3- hydroxybenzo[b] thiophenes with hydrazine derivatives afford novel pyrazolidines. The preparation of 2,2-disubstituted benzothieno[2,3-b]- and [3,2-b]- pyrans has been investigated. The [2,3-b] isomers exist preferentially as their dienone valence tautomers. In the latter series, …
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Exploration of Carbon-oxygen and Carbon-nitrogen Bond Formation Utilizing Trichloroacetimidates and Investigations of New Reactions Mediated By Oxoammonium Salts
… pyrazoles and benzotriazoles generally use hydrazine derivatives and limited regioselectivity. N-Alkylated pyrazole utilizing trichloroacetimidate electrophiles under Bronsted acid catalyzed conditions has been developed. Both primary and secondary imidates provided good yields. Benzylic …