Mayr's Database of Reactivity Parameters

Acceptor-Substituted Ethylenes

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
bh 6m
*

E Param.: -17.30

* Chem. Eur. J. 2010, 16, 1365-1371
10.1002/chem.200902487
dma(t-Bu)2QM
*

E Param.: -17.29

**** Angew. Chem. Int. Ed. 2002, 41, 91-95
10.1002/1521-3773(20[...]
2,6-dimethoxy-4-(4-(dimethylamino)benzylidene)cyclohexa-2,5-dienone
C17H19NO3 *

E Param.: -17.18

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
(E)-6-((1-methyl-1H-pyrrol-2-yl)methylene)benzo[d][1,3]dioxol-5(6H)-one
C13H11NO3 *

E Param.: -17.03

*** Org. Biomol. Chem. 2025, 23, 827-834
10.1039/D4OB01855A
(E)-2,6-di-tert-butyl-4-(3-phenylallylidene)cyclohexa-2,5-dien-1-one
C23H28O *
DMSO

E Param.: -17.00

*** Org. Lett. 2020, 22, 2182-2186
10.1021/acs.orglett.[...]
4-phenylbut-3-yn-2-one
C10H8O *

E Param.: -16.90

- Angew. Chem. Int. Ed. 2019, 58, 17704-17708
10.1002/anie.201909803
E)-2,6-di-tert-butyl-4-(3-(4-chlorophenyl)allylidene)cyclohexa-2,5-dien-1-one
C23H27ClO *
DMSO

E Param.: -16.84

*** Org. Lett. 2020, 22, 2182-2186
10.1021/acs.orglett.[...]
but-3-en-2-one (in DMSO)
C4H6O *
DMSO

E Param.: -16.76

*** J. Am. Chem. Soc. 2017, 139, 13318-13329
10.1021/jacs.7b05106
2-phenylethene-1-sulfonyl fluoride
C8H7FO2S *
DMSO

E Param.: -16.63

*** Angew. Chem. Int. Ed. 2016, 55, 12664-12667
10.1002/anie.201601875
butynone
C4H4O *

E Param.: -16.60

- Angew. Chem. Int. Ed. 2019, 58, 17704-17708
10.1002/anie.201909803
4-(2,2-bis(phenylsulfonyl)vinyl)-N,N-dimethylaniline
*
DMSO

E Param.: -16.53

*** Chem. Asian J. 2012, 7, 1401-1407
10.1002/asia.201101046
2,6-dimethoxy-4-(4-methoxybenzylidene)cyclohexa-2,5-dienone
C16H16O4 *

E Param.: -16.38

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
2,6-dimethyl-4-(4-(dimethylamino)benzylidene)cyclohexa-2,5-dienone
C17H19NO *

E Param.: -16.36

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
(E)-2,6-di-tert-butyl-4-(3-(4-nitrophenyl)allylidene)cyclohexa-2,5-dien-1-one
C23H27NO3 *
DMSO

E Param.: -16.25

*** Org. Lett. 2020, 22, 2182-2186
10.1021/acs.orglett.[...]
ani(t-Bu)2QM
*

E Param.: -16.11

**** Angew. Chem. Int. Ed. 2002, 41, 91-95
10.1002/1521-3773(20[...]
(E)-6-(4-(dimethylamino)benzylidene)benzo[d][1,3]dioxol-5(6H)-one
C16H15NO3 *

E Param.: -16.07

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
(E)-6-((E)-3-phenylallylidene)benzo[d][1,3]dioxol-5(6H)-one
C16H12O3 *

E Param.: -16.00

*** Org. Biomol. Chem. 2025, 23, 827-834
10.1039/D4OB01855A
(E)-10-(4-methoxybenzylidene)phenanthren-9(10H)-one
C22H16O2 *

E Param.: -15.93

*** J. Phys. Org. Chem. 2026, 39, e70061
10.1002/poc.70061
tol(t-Bu)2QM
C22H28O *

E Param.: -15.83

**** Angew. Chem. Int. Ed. 2002, 41, 91-95
10.1002/1521-3773(20[...]
(E)-6-(furan-2-ylmethylene)benzo[d][1,3]dioxol-5(6H)-one
C12H8O4 *

E Param.: -15.73

*** Org. Biomol. Chem. 2025, 23, 827-834
10.1039/D4OB01855A
fumaronitrile
C4H2N2 *
DMSO

E Param.: -15.71

*** Eur. J. Org. Chem. 2014, , 2956-2963
10.1002/ejoc.201301779
4-benzylidene-2,6-di-tert-butylcyclohexa-2,5-dien-1-one
C21H26O *

E Param.: -15.58

*** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
(E)-6-((1-methyl-1H-indol-2-yl)methylene)benzo[d][1,3]dioxol-5(6H)-one
C17H13NO3 *

E Param.: -15.55

*** Org. Biomol. Chem. 2025, 23, 827-834
10.1039/D4OB01855A
1,2-diaza-1,3-diene 1d
*
DMSO

E Param.: -15.38

*** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1f
*
MeOH

E Param.: -15.30

* Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1-phenylprop-2-en-1-one (in DMSO)
C9H8O *
DMSO

E Param.: -15.25

*** J. Am. Chem. Soc. 2017, 139, 13318-13329
10.1021/jacs.7b05106
(E)-6-(4-methoxybenzylidene)benzo[d][1,3]dioxol-5(6H)-one
C15H12O4 *

E Param.: -15.20

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
2,6-di-tert-butyl-4-(methoxymethylene)cyclohexa-2,5-dien-1-one
C16H24O2 *

E Param.: -15.10

*** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
2,6-di-tert.butyl-4-(3-fluorobenzylidene)cyclohexa-2,5-dienone
C21H25FO *

E Param.: -15.03

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
1,2-diaza-1,3-diene 1c
*
DMSO

E Param.: -14.91

*** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1e
*
MeOH

E Param.: -14.90

* Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
(E)-6-(4-methylbenzylidene)benzo[d][1,3]dioxol-5(6H)-one
C15H12O3 *

E Param.: -14.85

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
4-methoxy-<i>trans-beta</i>-nitrostyrene
*

E Param.: -14.70

*** J. Org. Chem. 2011, 76, 9370-9378
10.1021/jo201678u
jul-indan-1,3-dione
C22H19NO2 *

E Param.: -14.68

*** Org. Biomol. Chem. 2007, 5, 3020-3026
10.1039/b708025e
2-(4-methoxybenzylidene)-1,3-dithiane 1,1,3,3-tetraoxide
*
DMSO

E Param.: -14.55

*** Chem. Asian J. 2012, 7, 1401-1407
10.1002/asia.201101046
2,6-di-tert.butyl-4-(3,5-difluorobenzylidene)cyclohexa-2,5-dienone
C21H24F2O *

E Param.: -14.50

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
(E)-6-benzylidenebenzo[d][1,3]dioxol-5(6H)-one
C14H10O3 *

E Param.: -14.47

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
2,6-di-tert.butyl-4-(4-nitrobenzylidene)cyclohexa-2,5-dienone
C21H25NO3 *

E Param.: -14.36

*** Eur. J. Org. Chem. 2009, , 3203-3211
10.1002/ejoc.200900299
4-methyl-<i>trans-beta</i>-nitrostyrene
*

E Param.: -14.23

*** J. Org. Chem. 2011, 76, 9370-9378
10.1021/jo201678u
N-methyl maleimide
C5H7NO2 *
DMSO

E Param.: -14.07

*** Eur. J. Org. Chem. 2014, , 2956-2963
10.1002/ejoc.201301779
(E)-6-(3-fluorobenzylidene)benzo[d][1,3]dioxol-5(6H)-one
C14H9FO3 *

E Param.: -14.00

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
(E)-6-(4-chlorobenzylidene)benzo[d][1,3]dioxol-5(6H)-one
C14H9ClO3 *

E Param.: -13.99

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785
jul Meldrum's acid
C19H21NO4 *

E Param.: -13.97

*** J. Org. Chem. 2008, 73, 2738-2745
10.1021/jo702590s
1,2-diaza-1,3-diene 1b
*
DMSO

E Param.: -13.90

*** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
(2-(4-methoxyphenyl)ethene-1,1-diyldisulfonyl)dibenzene
*
DMSO

E Param.: -13.88

*** Chem. Asian J. 2012, 7, 1401-1407
10.1002/asia.201101046
<i>trans-beta</i>-nitrostyrene
*

E Param.: -13.85

*** J. Org. Chem. 2011, 76, 9370-9378
10.1021/jo201678u
julBBS
C19H21N3O3 *

E Param.: -13.84

*** J. Org. Chem. 2007, 72, 9170-9180
10.1021/jo071273g
2,6-di-tert-butyl-4-ethylidenecyclohexa-2,5-dien-1-one
C16H24O *

E Param.: -13.68

*** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
2-(p-(dimethylamino)benzylidene)-indan-1,3-dione
C18H15NO2 *

E Param.: -13.56

*** Org. Biomol. Chem. 2007, 5, 3020-3026
10.1039/b708025e
(E)-6-(4-(trifluoromethyl)benzylidene)benzo[d][1,3]dioxol-5(6H)-one
C15H9F3O3 *

E Param.: -13.54

*** Chem. Eur. J. 2025, 31, e202403785
10.1002/chem.202403785