Mayr's Database of Reactivity Parameters

Quinone Methides

For reactivities of structurally related compounds go to: Electrophiles » C-Electrophiles » Acceptor-Substituted Ethylenes » Quinone Methides

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Name Solvent Reactivity
Parameters 		Classification Reference
(title or year)
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
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)-10-(4-methoxybenzylidene)phenanthren-9(10H)-one
C22H16O2 *

E Param.: -15.93

 *** J. Phys. Org. Chem. 2026, 39, e70061
10.1002/poc.70061
(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.[...]
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.[...]
(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.[...]
(E)-2,6-di-tert-butyl-4-(3-(4-methoxyphenyl)allylidene)cyclohexa-2,5-dien-1-one
C24H30O2 *
 DMSO

E Param.: -17.42

 *** Org. Lett. 2020, 22, 2182-2186
10.1021/acs.orglett.[...]
2,6-di-tert-butyl-4-(2,2,2-trifluoroethylidene)cyclohexa-2,5-dien-1-one
C16H21F3O *
 DMSO

E Param.: -11.68

 *** Eur. J. Org. Chem. 2020, , 3812-3817
10.1002/ejoc.202000295