Results 41 to 50 of about 41,109 (281)
Why Woodward and Hoffmann? And Why 1965?**
The Chemical Record, Volume 23, Issue 1, January 2023., 2023 R. B. Woodward and Roald Hoffmann provided perfect intellectual and experiential synergy for their collaboration on orbital symmetry control of pericyclic reactions. This publication describes their idiosyncratic qualities and how perfectly they matched, at the right place and at the right time.
Jeffrey I. Seeman
wiley +1 more source
Towards Understanding the Synthesis and Reactivity of Alkynyl Sulfonamides [PDF]
, 2021 This thesis discusses the importance of the sulfonamide motif both in medicinal chemistry and as a synthetic tool. Particular focus is given to the alkynyl sulfonamide, a useful alkyne that first attracted the attention of this research group when it was
Luo, Yi
core
Angewandte Chemie, EarlyView.Stable imino‐substituted Au(III) carbenes are easily and efficiently prepared by trapping the transient (N^C^C)Au←:CH(dmp)+ carbene with nitriles. The corresponding free species are readily generated and display dual carbene / nitrile‐ylide reactivities. The diazo decomposition, nitrile insertion, and carbene transfer can be combined in three‐component
Rui Wei +4 more
wiley +2 more sources
Molecules, 2019 The alkylation of a series of nitroindazole derivatives with 1,2-dibromoethane afforded the corresponding N-(2-bromoethyl)- and N-vinyl-nitro-1H-indazoles.
Mohammed Eddahmi +9 more
doaj +1 more source
Reactive atomistic simulations of Diels-Alder-type reactions: Conformational and dynamic effects in the polar cycloaddition of 2,3-dibromobutadiene radical ions with maleic anhydride [PDF]
, 2020 The kinetics, dynamics and conformational specificities for the ionic Diels-Alder reaction (polar cycloaddition) of maleic anhydride with 2,3-dibromobutadiene radical ions have been studied theoretically using multisurface adiabatic reactive molecular dynamics. A competition of concerted and stepwise reaction pathways was found and both the s-cis and s-
arxiv +1 more source
Organic Letters, 2017 The double 1,3-dipolar cycloaddition of allenoates with nitrilimines has been achieved under mild reaction conditions, affording a variety of spirobidihydropyrazoles in moderate to excellent yields with excellent diastereoselectivities.
Honglei Liu +4 more
semanticscholar +1 more source
1,3 dipolar cycloaddition of münchnones: Factors behind the regio-selectivity
The Journal of Physical Chemistry A, 2022 The 1,3 dipolar cycloaddition reactions of münchnones and alkenes provide an expedite synthetic way to substituted pyrroles, an exceedingly important structural motif in the pharmaceutical and material science fields of research. The factors governing their regio-selectivity rationalization are not well understood.
Meylin Bocalandro +3 more
openaire +2 more sources
Angewandte Chemie, EarlyView.Xanthopinacol (xpin) boronates are a conceptually new class of masked boronic acids designed to alleviate many of the disadvantages of pinacol esters and other popular adducts. They can be formed directly from xanthone and UV light, undergo orthogonal transformations, and are cleavable under photoredox catalysis or oxidative conditions that recycle ...
David M. Heard +2 more
wiley +2 more sources
PHOSPHONATED ISOXAZOLIDINYL NUCLEOSIDES, A NEW CLASS OF MODIFIED NUCLEOSIDES [PDF]
Euromediterranean Biomedical Journal, 2014 This review offers an overview of the synthesis of phosphonated isoxazolidinyl nucleosides, a new class of interesting and potentially antiviral/antitumor agents.
Salvatore Giofrè
doaj +1 more source
Domino 1,3-Dipolar Cycloadditions of N-Alkyl-α-Amino Esters with Paraformaldehyde: A Direct Access to α-Hydroxymethyl α-Amino Acids [PDF]
, 2014 N-Alkyl-α-amino esters undergo a domino reaction, based on the iminium cation generation, with paraformaldehyde, followed by a 1,3-dipolar cycloaddition of the stabilized azomethine ylide with another equivalent of formaldehyde.
Castelló Moncayo, Luis Miguel +2 more
core +2 more sources