Results 11 to 20 of about 18,329 (303)

Chemoselectivity of Tertiary Azides in Strain‐Promoted Alkyne‐Azide Cycloadditions [PDF]

open access: yesChemistry – A European Journal, 2018
AbstractThe strain‐promoted alkyne‐azide cycloaddition (SPAAC) is the most commonly employed bioorthogonal reaction with applications in a broad range of fields. Over the years, several different cyclooctyne derivatives have been developed and investigated in regard to their reactivity in SPAAC reactions with azides.
Dennis Svatunek   +4 more
openaire   +7 more sources

Taming Unhindered Alkyl Azides by Intramolecular Hydrogen-Azide Interaction for Discriminative Conjugation onto Alkyl Diazides [PDF]

open access: yes, 2021
We report herein the unique reactivities of α-azido secondary acetamides (α-AzSAs) as minimal and unhindered azide structures. The NH–azide interaction in the α-AzSAs, supposed by DFT calculation, allowed selective conjugation in the presence of other ...
Koshiro, Maegawa   +5 more
core   +2 more sources

Synthesis of α-tertiary primary amines and 1,2-amino alcohols from vinyl azides by light induced denitrogenative alkylarylation/dialkylation [PDF]

open access: yes, 2023
Sterically congested α-tertiary primary amines are ubiquitous substructures in pharmaceutical and agrochemical agents yet are challenging to access.
Sifan, Li   +3 more
core   +1 more source

Divergent synthesis of chiral cyclic azides via asymmetric cycloaddition reactions of vinyl azides

open access: yesNature Communications, 2019
Vinyl azides generally act as 3-atom synthon through the fast release of molecular nitrogen, whereas keeping the azide group intact is more challenging. Here, the authors show a copper-catalyzed enantioselective cycloaddition of two types of vinyl azides
Nuligonda Thirupathi   +3 more
doaj   +1 more source

Recent Applications and Developments of Organic Azides in Total Synthesis of Natural Products

open access: yesNatural Product Communications, 2013
Organic azides have been exploited since their discovery because of their high reactivities. Various organic reactions using azides have been synthetically applied in chemical biology pharmaceuticals medicinal and agricultural areas.
Hiroki Tanimoto, Kiyomi Kakiuchi
doaj   +1 more source

EPR and pulsed ENDOR study of intermediates from reactions of aromatic azides with group 13 metal trichlorides

open access: yesBeilstein Journal of Organic Chemistry, 2010
The reactions of group 13 metal trichlorides with aromatic azides were examined by CW EPR and pulsed ENDOR spectroscopies. Complex EPR spectra were obtained from reactions of aluminium, gallium and indium trichlorides with phenyl azides containing a ...
Giorgio Bencivenni   +4 more
doaj   +1 more source

Overview of 1,5-Selective Click Reaction of Azides with Alkynes or Their Synthetic Equivalents

open access: yesMolecules, 2023
Nowadays, the click reaction of azides with alkynes has evolved rapidly and become one of the most efficient methods to synthesize 1,2,3-triazoles, which are an important class of N-containing heterocycles.
Yaqi Zhao   +3 more
doaj   +1 more source

Mn(iii)-Catalyzed Radical Reactions of 1,3-Dicarbonyl Compounds and Cyclopropanols with Vinyl Azides for Divergent Synthesis of Azaheterocycles

open access: yesCHIMIA, 2012
Mn(iii)-catalyzed formal [3+2]- and [3+3]-annulations have been developed using readily available vinyl azides with 1,3-dicarbonyl compounds and cyclopropanols.
Shunsuke Chiba
doaj   +1 more source

Construction of Benzenesulfonamide Derivatives via Copper and Visible Light-induced Azides and S(O)2–H Coupling

open access: yesMolecules, 2022
We here have developed an S(O)2–N coupling between phenylsulfinic acid derivatives and aryl azides by dual copper and visible light catalysis. In this efficient and mild pathway, the reaction produces sulfonamide compounds under redox-neutral condition ...
Zhipeng Liang, Ya-Nan Wu, Yang Wang
doaj   +1 more source

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