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chemistry, organic (192) 192
squaramide (133) 133
chemistry, multidisciplinary (119) 119
catalysis (117) 117
squaramides (114) 114
derivatives (111) 111
organocatalysis (111) 111
michael addition (98) 98
conjugate addition (69) 69
index medicus (69) 69
asymmetric catalysis (62) 62
1,3-dicarbonyl compounds (53) 53
catalysts (51) 51
enantiomers (51) 51
construction (45) 45
synthesis (42) 42
squaramide derivatives (41) 41
enantioselective synthesis (40) 40
hydrogen bonding (40) 40
chiral squaramides (38) 38
enantioselective michael addition (35) 35
nitroalkenes (35) 35
organocatalysts (35) 35
stereoisomerism (35) 35
chemistry, applied (33) 33
molecular recognition (33) 33
binding (32) 32
molecular structure (32) 32
receptors (32) 32
asymmetric-synthesis (30) 30
asymmetry (28) 28
cascade reaction (28) 28
chemistry, physical (28) 28
chiral squaramide (27) 27
aldehydes (26) 26
chemistry (26) 26
hydrogen (26) 26
recognition (26) 26
thiourea (26) 26
domino reactions (25) 25
highly efficient (23) 23
nitroalkanes (22) 22
design (21) 21
michael reaction (21) 21
nitroolefins (21) 21
squaric acid (21) 21
urea (21) 21
amides - chemistry (20) 20
asymmetric michael addition (20) 20
bifunctional organocatalysts (20) 20
ketones (20) 20
analysis (19) 19
anion recognition (18) 18
asymmetric organocatalysis (18) 18
chemistry, medicinal (18) 18
esters (18) 18
asymmetric synthesis (17) 17
efficient (17) 17
organic chemistry (17) 17
organic compounds (17) 17
chemical synthesis (16) 16
activation (15) 15
cascade reactions (15) 15
hydrogen bonds (15) 15
hydrogen-bonding organocatalysts (15) 15
alpha-keto esters (14) 14
anions (14) 14
asymmetrische katalyse (14) 14
cyclization (14) 14
aldol reaction (13) 13
aldol reactions (13) 13
alkaloids (13) 13
asymmetric-catalysis (13) 13
cinchona-based squaramide (13) 13
dynamic kinetic resolution (13) 13
enantioselectivity (13) 13
organocatalyst (13) 13
selective recognition (13) 13
acid (12) 12
amino-acids (12) 12
cinchonine-squaramide (12) 12
enantio-selectivity (12) 12
enantioselective michael-addition (12) 12
enantioselektivität (12) 12
michael-addition (12) 12
models, molecular (12) 12
stereoselective-synthesis (12) 12
3 contiguous stereocenters (11) 11
anion (11) 11
bifunctional organocatalyst (11) 11
bond donors (11) 11
chemical properties (11) 11
enantioselective construction (11) 11
inhibitors (11) 11
michael/michael addition (11) 11
oxindoles (11) 11
quinine - chemistry (11) 11
alpha,beta-unsaturated ketones (10) 10
cascade chemical reactions (10) 10
cooperative catalysis (10) 10
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Tetrahedron, ISSN 0040-4020, 01/2020, Volume 76, Issue 1, p. 130800
An enantioselective catalytic sulfa-Michael addition of alkyl thiols to α,β-unsaturated 2-acyl imidazoles using bifunctional organocatalysts is reported. The... 
Asymmetric | Sulfa-Michael | Squaramide | Organocatalysis | Imidazole
Journal Article
06/2011
Squaramides (3,4-diaminocyclobutene-1,2-diones) are known to be strong hydrogen bond donors, and recently have been demonstrated to show unusual responses to... 
anion interaction | squaramide | 0490 | hydrogen bond
Dissertation
TETRAHEDRON, ISSN 0040-4020, 09/2018, Volume 74, Issue 36, pp. 4769 - 4776
Journal Article
Organic Letters, ISSN 1523-7060, 02/2012, Volume 14, Issue 4, pp. 1090 - 1093
A bifunctional squaramide catalyzed sulfa-Michael/aldol cascade reaction between 1,4-dithiane-2,5-diol and chalcones with a low catalyst loading has been... 
HALF-THIOESTERS | ASYMMETRIC-SYNTHESIS | ALPHA,BETA-UNSATURATED KETONES | SULFA-MICHAEL ADDITION | CHIRAL SQUARAMIDES | ENANTIOSELECTIVE CONJUGATE ADDITION | CHEMISTRY, ORGANIC | ORGANOCATALYTIC DOMINO REACTIONS | STEREOCONTROLLED SYNTHESIS | BIFUNCTIONAL ORGANOCATALYSTS | SQUARAMIDE DERIVATIVES
Journal Article
Advanced Synthesis & Catalysis, ISSN 1615-4150, 10/2011, Volume 353, Issue 14‐15, pp. 2715 - 2720
A novel and recyclable catalyst, a C3‐symmetrical cinchonine‐squaramide, has been developed for the asymmetric Michael addition of 1,3‐dicarbonyl compounds to... 
cinchonine‐squaramide | catalyst recycling | C3‐symmetrical species | asymmetric Michael addition | symmetrical species | cinchonine-squaramide | Precipitation | Synthesis | Asymmetry | Catalysts | Esters | Selectivity | Catalysis | Michael reaction
Journal Article
Current Organic Chemistry, ISSN 1385-2728, 12/2016, Volume 20, Issue 28, pp. 2996 - 3013
Organocatalysis is an emerging and new field towards the direction of asymmetric synthesis and has shown a tremendous growth in 21st century. As the demand for... 
Bifunctional organocatalysts | Organocatalysis | Squaramide | ASYMMETRIC-SYNTHESIS | bifunctional organocatalysts | NATURAL-PRODUCTS | 1,3-DICARBONYL COMPOUNDS | CHEMISTRY, ORGANIC | ENANTIOSELECTIVE MICHAEL ADDITION | NITROOLEFINS | CHIRAL SQUARAMIDE | BOND | squaramide | DERIVATIVES | NITROALKENES | CONJUGATE ADDITION
Journal Article
by Chen, C and Wei, R and Yi, X and Gao, L and Zhang, M and Liu, H and Li, QS and Song, H and Ban, SR
JOURNAL OF ORGANIC CHEMISTRY, ISSN 0022-3263, 12/2019, Volume 84, Issue 23, pp. 15655 - 15661
An efficient method for the highly diastereoselective synthesis of chiral quaternary center-containing cyclopentenes via a cinchona alkaloid-derived... 
CHEMISTRY, ORGANIC | POTENT | CARBOCYCLIC NUCLEOSIDE ANALOG | SQUARAMIDE DERIVATIVES
Journal Article
Organic & biomolecular chemistry, ISSN 1477-0520, 01/2018, Volume 16, Issue 3, pp. 472 - 479
A series of optically active pyrano[3,2-c]chromenes have been synthesized through an asymmetric domino reaction of 4-hydroxy-2H-chromen-2-ones with... 
Journal Article
Tetrahedron: Asymmetry, ISSN 0957-4166, 01/2014, Volume 25, Issue 2, pp. 181 - 186
A set of BINOL–quinine–squaramides were synthesized, and then used as organocatalysts to promote the catalytic enantioselective Michael addition reaction of... 
CINCHONINE-SQUARAMIDE | CHEMISTRY, PHYSICAL | CATALYST | DERIVATIVES
Journal Article
Tetrahedron Letters, ISSN 0040-4039, 10/2018, Volume 59, Issue 42, pp. 3725 - 3737
Journal Article
Chemistry – A European Journal, ISSN 0947-6539, 11/2017, Volume 23, Issue 61, p. n/a
Different combinations of functionals and basis sets are evaluated to find an accurate computational approach for a squaramide‐catalyzed Henry reaction. This... 
mechanism | squaramide | trifunctional | computational | Henry reaction | Catalysis | Functionals | Computer applications
Journal Article
Organic and Biomolecular Chemistry, ISSN 1477-0520, 2018, Volume 16, Issue 3, pp. 472 - 479
Journal Article
ACS Catalysis, ISSN 2155-5435, 10/2017, Volume 7, Issue 10, pp. 6430 - 6439
This computational and experimental study represents a case where “push–pull π+/π–” (PPππ) systems have shown a concrete application in chemistry apart from... 
Squaramide | Organocatalysis | PPππ | Henry | Push-pull
Journal Article
Advanced Synthesis & Catalysis, ISSN 1615-4150, 11/2012, Volume 354, Issue 16, pp. 2905 - 2910
A chiral squaramide has been supported onto a polystyrene (PS) resin through a copper‐catalyzed azide–alkyne cycloaddition (CuAAC) reaction and used as a very... 
Michael addition | catalyst recycling | squaramide organocatalysis | asymmetric catalysis | heterogeneous catalysis | 1,3-DIPOLAR CYCLOADDITIONS | THIOUREA | CHIRAL SQUARAMIDES | CHEMISTRY, ORGANIC | ALDEHYDES | KETONES | CONTINUOUS-FLOW PRODUCTION | CHEMISTRY, APPLIED | DERIVATIVES | NITROALKENES | CATALYSTS | CONJUGATE ADDITION
Journal Article