Results 91 to 100 of about 7,607,880 (287)
Molecules, 2013 Density Functional Theory has been used to model the Diels-Alder reactions of the fullerene fragments triindenetriphenilene and pentacyclopentacorannulene with ethylene and 1,3-butadiene.
Julio A. Alonso +2 more
doaj +1 more source
Recent applications of the hetero Diels–Alder reaction in the total synthesis of natural products
, 2015 The synthetic utility and potential power of the Diels–Alder (D–A) reaction in organic chemistry is evident. These significances have been extended to the synthesis of a plethora and wide variety of heterocyclic compounds via [4 + 2] cycloaddition ...
M. Heravi +4 more
semanticscholar +1 more source
Asymmetric hetero Diels-Alder as an access to carbacephams [PDF]
, 2001 A short and efficient asymmetric synthesis of the (6R,7S)-7-tert-butoxycarbonylamino-2-ketocarbacepham is described. The key step involves the hetero Diels-Alder reaction of the benzylimine derived from the enantiomer of Garner's aldehyde with ...
Corzana, F. [0000-0001-5597-8127] +16 more
core +1 more source
An Integrated Building Block for Cascade Diels–Alder and Hetero-Diels–Alder Reactions
, 2022 The Diels–Alder (DA) reaction and hetero-Diels–Alder (HDA) reaction are among the most powerful methods for the construction of carbocycles and heterocycles. Herein, an integrated building block of DA and HDA reactions is described.
Shuheng Xu (11009858) +5 more
core +1 more source
Molecules, 2013 Helical-chiral double hydrogen bond donor catalysts promote the nitroalkene Diels-Alder reaction in an enantio- and periselective manner. This represents the first asymmetric catalytic nitroalkene Diels-Alder reaction via LUMO-lowering catalysis. To gain
Zhili Peng +2 more
doaj +1 more source
, 1980 This work was a kinetic study of the Diels-Alder reaction of isoprene with variously substituted benzalmalononitriles. Application of the Hammett equation, a linear free energy relationship, to the kinetic rate data yielded a value of 1.31 for rho.
Copp, James D.
core
o-Fluoranil Chemistry: Diels–Alder versus Hetero-Diels–Alder Cycloaddition
, 2016 The title quinone undergoes [4 + 2] cycloadditions in two ways, Diels–Alder on the ring and hetero-Diels–Alder by attack at the oxygens. The latter mode of reaction is strongly favored thermodynamically, but there is a kinetic bias favoring the normal ...
John Shellito (2440546) +2 more
core +1 more source
Estudos sobre o uso do NbCl5 como ácido de Lewis em reações de Povarov
Orbital: The Electronic Journal of Chemistry, 2011 RESUMO: O objetivo deste trabalho foi investigar o uso de NbCl5 como ácido de Lewis em reações de cicloadição (Reação Aza-Diels-Alder (Povarov)) entre bases de Schiff e éteres enólicos.
Luiz Carlos Silva-Filho, Mayara Frenhe
doaj +1 more source
Fluorophobic Acceleration of Diels−Alder Reactions
, 2016 Fluorophobic Acceleration of Diels−Alder ...
Kathleen E. Myers (2982246) +1 more
core +1 more source
Recent Applications of the Diels-Alder Reaction in the Synthesis of Natural Products (2017-2020)
, 2021 The Diels-Alder reaction has long been established as an extremely useful procedure in the toolbox of natural product chemists. It tolerates a wide spectrum of building blocks of different complexity and degrees of derivatization, and enables the ...
Kalesse, Markus +3 more
core +1 more source