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1 ing acetylene or a "masked acetylene" as the dienophile.
2 ubstrates and electronic distribution in the dienophile.
3 anilines and aldehydes possessing a pendent dienophile.
4 of the Diels-Alder reactions with an allene dienophile.
5 ls-Alder reaction with an alkenyl or alkynyl dienophile.
6 additional reagents apart from a diene and a dienophile.
7 enes with 1,4-quinone monoketal and acrolein dienophiles.
8 with polymer-supported acyl- and arylnitroso dienophiles.
9 rning on reactivity toward trans-cyclooctene dienophiles.
10 ch, electron-deficient, and electron-neutral dienophiles.
11 e in Diels-Alder cycloaddition with reactive dienophiles.
12 rom less nucleophilic dienes and unactivated dienophiles.
13 go thermal cycloadditions with electron-rich dienophiles.
14 d undergo Diels-Alder reactions with various dienophiles.
15 lerant toward a variety of alkyl-substituted dienophiles.
16 the difference in LUMO energies for the two dienophiles.
17 onylchromones, isocyanides, and nonsymmetric dienophiles.
18 ng in stronger interactions with the HOMO of dienophiles.
19 zation with the preformed glycosyl diene and dienophiles.
20 s a stepwise pathway even for less activated dienophiles.
21 diene and moderately to highly electrophilic dienophiles.
22 is indeed favored for the most electrophilic dienophiles.
23 tility, expanding the range of participating dienophiles.
26 iels-Alder reaction between diene (R)-61 and dienophile 55, followed by an intramolecular nucleophili
27 ction features the first use of an azepinone dienophile (8), with high diastereofacial selectivity ac
28 tom at the gamma position, an amine-aldehyde-dienophile (AAD) [4 + 2] cycloaddition takes place by fo
29 udy the ability of the isoimidium group as a dienophile activator in DA reactions, as well as its beh
30 lobutadiene can function as both a diene and dienophile, affording a mixture of vinylcyclobutane (2 +
31 to a three-membered diene and a two-membered dienophile, analogous to a retro-Diels-Alder reaction, m
32 driven Diels-Alder reaction of a fluorinated dienophile and a borole that shows remarkable diastereos
36 sting substituents judiciously placed on the dienophile and intrinsic to the widely used tetrazine 2,
38 , in which the tether linking the initiating dienophile and oxadiazole bears a chiral substituent tha
39 chiral substituent on the tether linking the dienophile and oxadiazole was used to control the facial
42 review we discuss the range of commonly used dienophiles and aza-dienes for this process whilst highl
43 r (DTDA) reaction by employing two different dienophiles and eventually generating a small repository
46 ddition reaction involving in situ arynes as dienophiles and substituted 1,2,4,5-tetrazines as dienes
47 azolidinone appended with a number of common dienophiles and various dienes demonstrate the utility o
49 re possible for both the heterodiene and the dienophile, and the target products are obtained in good
50 nvolve highly substituted dienes and juglone dienophiles, and there is an opposite regiochemical outc
53 iene intermediates using maleic anhydride as dienophile as well as kinetic studies confirm the calcul
54 upon mixing the dendralene and an excess of dienophile at ambient temperature in a common solvent, s
56 onalization of the selectivity obtained with dienophiles based on (R)-bis((R)-1-phenylethyl)amine.
57 ive Diels-Alder reactions with monoactivated dienophiles, but require fairly forcing conditions, thus
58 oaddition reaction with norbornadiene and as dienophiles (C=S) in the reaction with cyclopentadiene.
59 stereogenic center between the diene and the dienophile can control the relative and absolute configu
60 ted by (2R,5R)-2,5-diphenylpyrrolidine based dienophiles can easily be rationalized by a C2 symmetric
61 xidation level of the alpha,beta-unsaturated dienophile (carbonyl and carboxyl), whereas proton catal
62 and resulting in a wider range of potential dienophile choices or the use of milder reaction conditi
64 require either electronic activation of the dienophile, conformational restriction of the tether, or
65 allylic C-H alkylation and approximated to a dienophile contained within the tertiary nucleophile to
66 the course of cycloadditions of Diels-Alder dienophiles containing linked enyne sites, each substitu
71 eteroatom substitution and utilizing alkynyl dienophiles enhances the reaction rates up to 10(5)-fold
73 ectron-withdrawing groups on the aryl alkyne dienophile facilitated the reaction, and these substrate
74 tem toward a number of indene derivatives as dienophiles, first in intermolecular and thence intramol
76 sine-L36 acts as a Lewis acid activating the dienophile for nucleophilic attack, and asparagine-L91 a
78 omprise a new and versatile family of chiral dienophiles for the venerable Diels-Alder (DA) cycloaddi
79 ituted orthoquinone monoketals with olefinic dienophiles furnished functionalized ortho-endo bicyclo[
80 These furo[3,4-c]furans react with various dienophiles, furnishing anisole derivatives derived by l
81 e at 80 degrees C in the presence of several dienophiles gave [4 + 2]-cycloadducts derived from the D
83 o-Diels-Alder reactions of iminium and imine dienophiles has been explored with density functional th
86 nes, and three tetrazines) with the ethylene dienophile have been explored with density functional th
87 of N-glycosides of enone sugars as reactive dienophile in asymmetric synthesis of bicyclic adduct th
88 part of the tether system works to place the dienophile in closer proximity to the furan ring, thereb
90 reactivity trend: cyclobutadiene serves as a dienophile in intramolecular reactions when it is connec
91 model study required the modification of the dienophile in the [4+2] cycloaddition to accommodate the
92 n between a nitrobenzene, an aldehyde, and a dienophile in the presence of iron powder as a reductant
93 nstead of gaseous ethylene, as the source of dienophile in this one-pot synthesis, makes the aromatic
95 DMTB and related reagents engage diverse dienophiles in an initial Diels-Alder or metal-catalyzed
96 lpha,beta-unsaturated N-acyl iminium ions as dienophiles in Diels-Alder reactions and electrophilic a
97 nones were prepared and subsequently used as dienophiles in Diels-Alder reactions to form building bl
98 nones are demonstrated to function as potent dienophiles in inter- and intramolecular Diels-Alder cyc
99 -Alder cycloaddition with electron-deficient dienophiles in the absence of any activator or catalyst,
100 hat the regiopreferences of these dienes and dienophiles in these cases are not a fixed property of e
101 servation that furans and an indole serve as dienophiles in this cascade reaction permitted the synth
102 ion, which is dependent on the nature of the dienophile, initially led to the development of an unant
104 served when the termini of the diene and the dienophile involved in the shorter of the forming bonds
106 2] cycloaddition of a conjugated diene to a dienophile, is one of the most powerful reactions in syn
107 resting reactivity was observed with certain dienophiles leading to ring-opening of the initially for
108 s are reacted with the isotopically enriched dienophiles maleic anhydride and a C18-alkyl chain-modif
109 ) reactions that occur between the diene and dienophile moieties located on a single macrocyclic trie
110 -Alder reactions with tethered electron-poor dienophiles more rapidly and in higher yield than non-ni
111 lenes (as multidienes) with an electron poor dienophile, N-methylmaleimide (NMM), has been studied.
112 f various 3,4-diarylfurans with a variety of dienophiles, neat and under mild conditions in the absen
115 ic diene component either with water-soluble dienophiles or with dienophiles requiring mixtures of wa
116 nomaly is related to the fact that the diene/dienophile orientation in the charge-transfer [MeOSty, o
118 oxidation state) of the 4pi (diene) and 2pi (dienophile) pairs of reactants dictates the oxidation st
119 involving unsymmetrical alkenyl and alkynyl dienophiles proceed with good to excellent regioselectiv
120 ith both achiral and chiral acrylate-derived dienophiles provides rapid access to the bicyclo[2.2.2]d
121 Limited reactions were observed with other dienophiles, providing the expected cycloadducts in most
122 ither with water-soluble dienophiles or with dienophiles requiring mixtures of water and organic solv
124 Nitroalkene 26 containing a diene as the dienophile served well in the tandem cycloaddition to af
126 carbonyl-containing series, a wide range of dienophile substituents were screened including esters,
128 t both the amino acid-Cu(2+) complex and the dienophile substrate are included inside the macrocyclic
130 e turn-on (up to 400-fold) when reacted with dienophiles such as cyclopropenes and trans-cyclooctenes
131 dioneketene, which reacts with electron-rich dienophiles such as enol ethers to afford [4 + 2] cycloa
132 presence of an amido carbonyl as part of the dienophile tether, as opposed to the annealed ring (66)
133 Cyclopropenyl ketones are highly reactive dienophiles that can engage a range of cyclic dienes and
134 s of cyclohexadiene and cycloheptadiene with dienophiles that give relatively synchronous transition
135 A diene and either the HSty, ClSty, or MeSty dienophile, the donor/acceptor arrangements in the charg
136 the lack of reaction of the non-fluorinated dienophile, the stereochemical outcomes, and the rate ac
138 With dihydropyridone 5 and cis-disubstituted dienophiles, the resulting cycloadducts were obtained as
139 complexes containing both the diene and the dienophile; the cycloaddition reaction occurs in the cav
140 several symmetrical as well as unsymmetrical dienophiles, these dendralenes afforded diversity-orient
141 t rates of reaction of these products with a dienophile through the Diels-Alder reaction confirmed th
142 e heterodiene component and the other as the dienophile to afford different types of dimeric products
143 s synthesized from L-lactide and used as the dienophile to prepare spiro[6-methyl-1,4-dioxane-2,5-dio
144 l Diels-Alder reaction relied on an "ynoate" dienophile to rapidly assemble the required resorcylinic
145 undergo Diels-Alder cyclization with various dienophiles to afford novel octahydroquinolines containi
146 -Alder cycloaddition with electron-deficient dienophiles to afford, without any significant selectivi
147 We have found 2-brominated cycloalkenone dienophiles to be both highly endo selective and signifi
149 itions with electron-rich and neutral alkene dienophiles to generate a tetrahydropyridinium ion as th
150 eta-enals can act as well as highly reactive dienophiles to render adducts endowed with nitrogenated
155 d Diels-Alder cycloaddition with an external dienophile usually exists, except in the case of 5-subst
156 ying highly electron rich 2'-hydroxychalcone dienophiles via electron transfer-initiated Diels-Alder
157 n cycloaddition, and a methylenecyclopropane dienophile was used for a stereoselective intramolecular
158 of isatins compared to other carbonyl based dienophiles was demonstrated and rationalized with the a
163 adiene, and cycloheptadiene with a series of dienophiles were studied with quantum mechanical calcula
164 lving 1,3-disubstituted nonequivalent allene dienophiles were studied, and some surprising results we
165 The relative configuration adjacent to the dienophile, which led to C4 of the decalin system, as we
166 in the conserved hexacene unit works as the dienophile while the tetraazahexacene participates as th
167 f the diene to the more hindered face of the dienophile, while electrostatic interactions control the
169 nd ArNO), and nitrosoformaldehyde (CHONO) as dienophiles with butadiene and a series of 1- and 2-subs
170 siderations favor endo cycloadducts for both dienophiles with DHP, while total energy considerations,
171 ion via a Diels-Alder reaction of acetylenic dienophiles with subsequent Michael additions of aromati
172 A new method for the generation of N-acylazo dienophiles with tetra-n-butylammonium periodate is repo
173 nproductive consumption of the electron-rich dienophiles without productive activation of the electro
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