MacMillan-iminium ion (2nd generation) |
MeCN | E Param.: -5.52 |    | Angew. Chem. Int. Ed. 2011, 50, 9953-9956 10.1002/anie.201103683 |
(mor)2CH+ |
| E Param.: -5.53 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 10.1021/ja010890y |
Vilsmeier ion |
| E Param.: -5.77 |  | Acc. Chem. Res. 2003, 36, 66-77 10.1021/ar020094c |
4-aza-6-nitrobenzofuroxan |
| E Param.: -5.86 |    | J. Org. Chem. 2005, 70, 6242-6253 10.1021/jo0505526 |
(mpa)2CH+ |
| E Param.: -5.89 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 10.1021/ja010890y |
(S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(4-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium |
dichloromethane | E Param.: -5.90 |   | Asian J. Org. Chem. 2014, 3, 550-555 10.1002/ajoc.201402009 |
(2S,5S)-5-benzyl-3-methyl-4-oxo-1-(3-phenylallylidene)-2-((E)-styryl)imidazolidin-1-ium |
dichloromethane | E Param.: -5.90 |   | Asian J. Org. Chem. 2014, 3, 550-555 10.1002/ajoc.201402009 |
2-phenyl-1,3-dithiolan-2-ylium ion |
| E Param.: -5.91 |    | Acc. Chem. Res. 2003, 36, 66-77 10.1021/ar020094c |
bis(1-methylindol-3-yl)methylium ion |
| E Param.: -5.99 |    | J. Org. Chem. 2015, 80, 8643-8656 10.1021/acs.joc.5b01298 |
(S,E)-2,2,3-trimethyl-4-oxo-5-((perfluorophenyl)methyl)-1-((E)-3-phenylallylidene)imidazolidin-1-ium |
dichloromethane | E Param.: -6.00 |   | Angew. Chem. Int. Ed. 2013, 52, 7967-7971 10.1002/anie.201301864 |
(S,E)-5-benzyl-1-((E)-3-(4-cyanophenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium |
dichloromethane | E Param.: -6.00 |   | Asian J. Org. Chem. 2014, 3, 550-555 10.1002/ajoc.201402009 |
N-(phenylsulfonyl)-N-((trifluoromethyl)thio)benzenesulfonamide |
| E Param.: -6.06 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 10.1002/anie.201805859 |
(S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(3-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium |
dichloromethane | E Param.: -6.10 |   | Asian J. Org. Chem. 2014, 3, 550-555 10.1002/ajoc.201402009 |
4-nitrobenzodifuroxan (NBDF) |
| E Param.: -6.15 |    | Chem. Eur. J. 2007, 13, 8317-8324 10.1002/chem.200700676 |
1-phenyl-propyn-1-ylium-Co2(CO)5(PPh3) |
| E Param.: -6.19 |    | Acc. Chem. Res. 2003, 36, 66-77 10.1021/ar020094c |
3-(4-(dimethylamino)benzylidene)-1-methyl-3H-indol-1-ium ion |
| E Param.: -6.26 |    | J. Org. Chem. 2015, 80, 8643-8656 10.1021/acs.joc.5b01298 |
4-cyano-6-nitro-benzofuroxane |
| E Param.: -6.41 |    | J. Org. Chem. 2005, 70, 6242-6253 10.1021/jo0505526 |
2-phenyl-1,3-dithianylium ion |
| E Param.: -6.43 |    | Acc. Chem. Res. 2003, 36, 66-77 10.1021/ar020094c |
N-(trifluoromethyl)thio)saccharin |
| E Param.: -6.48 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 10.1002/anie.201805859 |
dimethylmethyleneammonium ion |
| E Param.: -6.69 |  | Acc. Chem. Res. 2003, 36, 66-77 10.1021/ar020094c |