戻る
「早戻しボタン」を押すと検索画面に戻ります。 [閉じる]

コーパス検索結果 (１語後でソート)

通し番号をクリックするとPubMedの該当ページを表示します
1 ansition states when PR is used with (8S,9S)-cinchona.
2 erivatives and enones in the presence of the Cinchona alkaloid amine.
3 nditions with 10 mol% of a readily available cinchona alkaloid ammonium catalyst.
4 ities comparable with those reported for the Cinchona alkaloid ammonium salts derivatives (83-96% ee)
5            The zwitterionic adduct between a cinchona alkaloid and ketone is adsorbed on Pt through t
6 ide, using a catalytic amount of a silylated cinchona alkaloid as a source of chirality.
7  discovery that, upon proper modification, a cinchona alkaloid bearing a thiourea functionality at 6'
8 rs can be prepared by thiourea or squaramide cinchona alkaloid bifunctional organocatalysts with the
9 is demonstrated for noncovalent complexes of cinchona alkaloid carbamate chiral selectors with N-dini
10 ogen bonding transition state (TS) model for cinchona alkaloid catalysis that we recently showed to b
11                                          The cinchona alkaloid catalyst benzoylquinine (BQ) mediates
12  and hydroperoxides and an easily accessible cinchona alkaloid catalyst, this novel reaction will ope
13        The reaction requires 10 mol % of the cinchona alkaloid catalyst, which serves as a general ba
14 oles with imines catalyzed by a bifunctional cinchona alkaloid catalyst.
15 reported by MacMillan, which uses a modified cinchona alkaloid catalyst.
16                                 C-9 arylated cinchona alkaloid catalysts have been found to be consid
17 ic anhydrides (AMMA) catalyzed by a class of cinchona alkaloid catalysts involves an oxyanion hole co
18      Predicted enantioselectivities of three cinchona alkaloid catalysts, namely DHQD-PHN, DHQD-MEQ,
19 n of the reactivity of acid chlorides, using cinchona alkaloid catalysts, results in chiral alpha,bet
20 performance achieved by the use of a proline cinchona alkaloid conjugate designed in a de novo fashio
21 imal catalytic system was determined to be a cinchona alkaloid derivative (TMS-quinine or Me-quinidin
22  conformation studies with a designed, rigid cinchona alkaloid derivative as a probe.
23                      Herein, we identified a cinchona alkaloid derivative containing urea (C1), which
24          The reaction is simply catalyzed by cinchona alkaloid derivatives affording the final alkyla
25  alcohol dichlorination catalyzed by dimeric cinchona alkaloid derivatives and employing aryl iododic
26 e, commercially available acid halides using cinchona alkaloid derivatives as catalysts and polychlor
27                                       Chiral cinchona alkaloid derivatives work best when paired with
28        The reactions herein are catalyzed by cinchona alkaloid derivatives, with the best performance
29  self-assembled in situ from amino acids and cinchona alkaloid derivatives.
30  of Lewis acids were screened in tandem with cinchona alkaloid derivatives; surprisingly, trans-(Ph(3
31                                          The Cinchona alkaloid derived chiral ammonium salt developed
32 fur center were achieved with an inexpensive cinchona alkaloid derived PTC.
33           Various structural elements of the Cinchona alkaloid dimers are interrogated to establish a
34 eveloped catalysts, readily derived from the Cinchona alkaloid family of natural products, which can
35 Reaction of dimethylsulfonium methylide with Cinchona alkaloid ketones proceeds with complete diaster
36 vities of reductions of activated ketones on cinchona alkaloid modified platinum is proposed and is s
37 dings underline the privileged nature of the cinchona alkaloid scaffold and provide insight into how
38 onformational interconversion barrier of the cinchona alkaloid scaffold.
39 ted domino coupling and rearrangement of the Cinchona alkaloid skeleton has been found to occur in th
40 sembled from both enantiomers of proline and cinchona alkaloid thiourea derivatives.
41 Os) that are self-assembled from proline and cinchona alkaloid thioureas (such as a quinidine-derived
42                                 Bifunctional Cinchona alkaloid thioureas efficiently catalyze asymmet
43 nitroolefins in the presence of 1-6 mol % of cinchona alkaloid urea derivatives, and provided access
44 his dynamic kinetic resolution, the modified cinchona alkaloid was found to serve dual catalytic role
45 kyl-9-BBN derivatives in the presence of the Cinchona alkaloid, cinchonidine, and base.
46 alysis via a complex of silver acetate and a cinchona alkaloid, particularly hydroquinine, with compl
47    The reactions are catalyzed by a modified cinchona alkaloid, which can function as a bifunctional,
48                                        Using cinchona alkaloid-based catalysts, high selectivity has
49 alization/oxa-Michael addition cascade using cinchona alkaloid-based chiral bifunctional amino-squara
50 First, our kinetic studies indicate that the cinchona alkaloid-catalyzed alcoholysis proceeds by a ge
51  dioxolanediones was realized via a modified cinchona alkaloid-catalyzed alcoholytic opening of the d
52 antioenriched dihydropyrimidone core was the Cinchona alkaloid-catalyzed Mannich reaction of beta-ket
53                  The highly enantioselective cinchona alkaloid-catalyzed Mannich reaction of dicarbon
54                                              Cinchona alkaloid-catalyzed reaction of ethyl glyoxylate
55 ic induction in aldol reactions catalyzed by cinchona alkaloid-derived amines, and chiral vicinal dia
56 t matching effect between the chirality of a cinchona alkaloid-derived aminophosphine ligand for the
57 ed heterocycles can also be prepared using a Cinchona alkaloid-derived bifunctional organocatalyst fo
58     Furthermore, the active conformer of the cinchona alkaloid-derived catalyst DHQD-PHN was clarifie
59 terization of the active conformation of the cinchona alkaloid-derived catalyst for a desymmetrizatio
60 mization of N-acyl-1,2-aminoalcohols using a cinchona alkaloid-derived catalyst that operates through
61     Following single electron oxidation of a cinchona alkaloid-derived catalyst, enantiodetermining h
62  greater than that of a widely used thiourea cinchona alkaloid-derived catalyst.
63 tracarboxylate dimer, and its two associated cinchona alkaloid-derived cations.
64 ystematic structural "knockout" study on the cinchona alkaloid-derived chiral cation to elucidate whi
65 anionic Rh complex that is ion-paired with a Cinchona alkaloid-derived chiral cation.
66 h(II, II) complexes that are ion-paired with cinchona alkaloid-derived chiral cations.
67 Du Bois' esp ligand that are associated with cinchona alkaloid-derived chiral cations.
68                                  A series of Cinchona alkaloid-derived dimers were obtained in high y
69                                              Cinchona alkaloid-derived organocatalysts as Bronsted ba
70 ines and enones under the catalysis of a new cinchona alkaloid-derived phase-transfer catalyst.
71 s reaction, disclosed by List et al. using a cinchona alkaloid-derived primary amine (cinchona amine)
72                                        Using cinchona alkaloid-derived primary amines as catalysts an
73 -fluorination of cyclic ketones catalyzed by cinchona alkaloid-derived primary amines is determined w
74 th phenylglyoxal hydrates were realized with cinchona alkaloid-derived thiourea catalysts.
75                                          The cinchona alkaloid-derived urea-catalyzed asymmetric conj
76 lfa-Michael addition reaction catalyzed by a cinchona alkaloid-squaramide bifunctional organocatalyst
77 nding model, which works for cinchonidine or cinchona alkaloid-urea catalyzed sulfa-Michael addition
78 model involves nucleophilic catalysis by the cinchona alkaloid.
79 saturated pyrazolones in the presence of the cinchona-alkaloid derived hydrogen-bonding catalyst prov
80 ration of supercoiled plasmid topoisomers on cinchona-alkaloid modified silica-based stationary phase
81                 In comparison to traditional cinchona-alkaloid-based phase-transfer catalysts, these
82                        Herein, we disclose a cinchona-alkaloid-based squaramide-catalyzed intermolecu
83                                            A cinchona-alkaloid-derived chiral primary-amine-catalyzed
84                                    The first cinchona-alkaloid-organocatalyzed enantioselective synth
85                                              Cinchona alkaloids and their derivatives are widely used
86 mperature adsorption of four closely related cinchona alkaloids and three reference quinoline-based c
87    In particular, sulfonamide derivatives of cinchona alkaloids are highly enantioselective desymmetr
88 iomers of a product using pseudoenantiomeric cinchona alkaloids as catalysts streamlining the synthes
89 rt the discovery of novel N,N'-disubstituted cinchona alkaloids as efficient phase-transfer catalysts
90      Wynberg's report from 1977 that natural cinchona alkaloids catalyze the asymmetric conjugate add
91 es have been enantioselectively catalyzed by Cinchona alkaloids functionalized with a hydrogen bond d
92                      The 9-amino(9-deoxy)epi cinchona alkaloids have expanded the synthetic potential
93 f solvent-induced conformational behavior of cinchona alkaloids in their reactivity.
94  modification the conformational behavior of cinchona alkaloids in various solvents can be convenient
95                                The series of Cinchona alkaloids includes known C6' (thio)urea and sul
96                 We also demonstrate that the cinchona alkaloids quinidine and quinine give rise to pr
97 ndant and nature-derived 9-amino-9-deoxy-epi-cinchona alkaloids to activate ketones as transient seco
98 ia include glycoprotein IIb/IIIa inhibitors, cinchona alkaloids, antibiotics, anticonvulsants, and he
99 and quaternary ammonium bromide derived from cinchona alkaloids, provided nonracemic allene derivativ
100 cleophilic catalysis conditions with dimeric cinchona alkaloids, providing excellent enantiocontrol o
101 enantiomerically pure forms resemble 9-amino-Cinchona alkaloids.
102  with naturally occurring pseudoenantiomeric Cinchona alkaloids.
103 ated chiral cations derived from quaternized cinchona alkaloids.
104 gs (X-ray) were obtained via modification of Cinchona alkaloids.
105 echanistic studies of reactions catalyzed by cinchona alkaloids.
106  insight into the conformational behavior of cinchona alkaloids.
107 laced from the surface by any of those other cinchona alkaloids.
108 del of stereoselectivity is proposed for the cinchona amine catalysis of this reaction.
109 tes, structure-activity relationships of the cinchona amine catalyst, and rationalization of the abso
110  chiral iridium phosphoramidites PR/S-Ir and cinchona amine is established through transition-state m
111 g a cinchona alkaloid-derived primary amine (cinchona amine) organocatalyst, have been determined wit
112 lketenes, providing a model for catalysis by cinchona and related alkaloids in stereoselective additi
113 larial compounds are quinine, extracted from cinchona bark, and artemisinin (qinghao), extracted from
114 , and arylations to the development of novel cinchona-based organocatalysts for asymmetric hydrosilyl
115  of basic understanding of the mechanisms of cinchona-based primary aminocatalysis.
116 es using a combination of pseudoenantiomeric cinchona-based thiourea catalysts.
117 bonding interactions offered by the thiourea-cinchona bifunctional framework.
118                                          Bis-cinchona catalyst 3b activates the Michael addition reac
119 yl moiety in the case of PR with the (8R,9R)-cinchona catalyst combination, whereas a series of C-H..
120 on of the quinuclidine tertiary amine of the cinchona catalyst on MK.
121 alyst is uncovered: upon condensation of the cinchona catalyst with the enone, the resulting covalent
122  (MPK) in the presence of pseudoenantiomeric cinchona catalysts (trimethylsilylquinine (TMSQ) or meth
123 of only 0.5 mol % hybrid catalyst based on a Cinchona core allows the chlorination reaction to be con
124 , or 2-hydroxyacetophenone, catalyzed by the cinchona derivative cinchonine.
125          The commercially available dimer of cinchona derivatives (DHQ)(2)PYR was used as a catalyst.
126 -keto esters catalyzed by hybrid amide-based Cinchona derivatives.
127 -keto esters catalyzed by hybrid amide-based Cinchona derivatives.
128                           When 10 mol % of a cinchona derived quaternary ammonium salt was employed a
129                      When a combination of a cinchona-derived aminophosphine precatalyst and silver o
130  to perform, uses a new and readily prepared cinchona-derived bifunctional catalyst, is broad in scop
131 he reaction proceeded under the catalysis of Cinchona-derived quaternary ammonium phenoxide that, in
132 talysis of readily available and inexpensive Cinchona-derived quaternary ammonium salts.
133 he quinoline ring at the C8 chiral carbon of cinchona-enamine plays an anchoring role.
134            A stepwise pathway wherein the MK-cinchona enolate (enolate-A) adds to MPK in the selectiv
135     We report a class of quaternary ammonium Cinchona-functionalized crown ether-strapped calix[4]are
136 unds, as most prominently represented by the cinchona-modified Pt and Pd catalysts for the asymmetric
137 provides a new, general model for asymmetric cinchona organocatalysis.
138 onimidamides via asymmetric acylation with a cinchona-phosphinate catalyst.
139  We have also investigated the corresponding cinchona squaramide-catalyzed reaction and found that it
140 y of Soos' landmark discovery from 2005 that cinchona thioureas catalyze the asymmetric Michael addit
141 nt the first detailed mechanistic study of a cinchona urea-catalyzed reaction.

 
Page Top