-
1
-
-
41949110192
-
-
For recent reviews on modular ligands or catalysts, see: Reetz, M. T. Angew. Chem., Int. Ed. 2008, 47, 2556-2588
-
(2008)
Angew. Chem., Int. Ed.
, vol.47
, pp. 2556-2588
-
-
Reetz, M.T.1
-
2
-
-
38049036296
-
-
Blaser, H.-U.; Pugin, B.; Spindler, F.; Thommen, M. Acc. Chem. Res. 2007, 40, 1240-1250
-
(2007)
Acc. Chem. Res.
, vol.40
, pp. 1240-1250
-
-
Blaser, H.-U.1
Pugin, B.2
Spindler, F.3
Thommen, M.4
-
4
-
-
0032125775
-
-
Nakajima, M.; Saito, M.; Shiro, M.; Hashimoto, S. J. Am. Chem. Soc. 1998, 120, 6419-6420
-
(1998)
J. Am. Chem. Soc.
, vol.120
, pp. 6419-6420
-
-
Nakajima, M.1
Saito, M.2
Shiro, M.3
Hashimoto, S.4
-
5
-
-
0742304468
-
-
Nakajima, M.; Yokota, T.; Saito, M.; Hashimoto, S. Tetrahedron Lett. 2004, 45, 61-64
-
(2004)
Tetrahedron Lett.
, vol.45
, pp. 61-64
-
-
Nakajima, M.1
Yokota, T.2
Saito, M.3
Hashimoto, S.4
-
6
-
-
9944259566
-
-
Nakajima, M.; Kotani, S.; Ishizuka, T.; Hashimoto, S. Tetrahedron Lett. 2005, 46, 157-159
-
(2005)
Tetrahedron Lett.
, vol.46
, pp. 157-159
-
-
Nakajima, M.1
Kotani, S.2
Ishizuka, T.3
Hashimoto, S.4
-
8
-
-
33847632961
-
-
Kotani, S.; Hashimoto, S.; Nakajima, M. Tetrahedron 2007, 63, 3122-3132
-
(2007)
Tetrahedron
, vol.63
, pp. 3122-3132
-
-
Kotani, S.1
Hashimoto, S.2
Nakajima, M.3
-
9
-
-
44349160001
-
-
Nakanishi, K.; Kotani, S.; Sugiura, M.; Nakajima, M. Tetrahedron 2008, 64, 6415-6419
-
(2008)
Tetrahedron
, vol.64
, pp. 6415-6419
-
-
Nakanishi, K.1
Kotani, S.2
Sugiura, M.3
Nakajima, M.4
-
10
-
-
52649107590
-
-
Sugiura, M.; Sato, N.; Kotani, S.; Nakajima, M. Chem. Commun. 2008, 4309-4311
-
(2008)
Chem. Commun.
, pp. 4309-4311
-
-
Sugiura, M.1
Sato, N.2
Kotani, S.3
Nakajima, M.4
-
12
-
-
67449088256
-
-
Kotani, S.; Shimoda, Y.; Sugiura, M.; Nakajima, M. Tetrahedron Lett. 2009, 50, 4602-4605;
-
(2009)
Tetrahedron Lett.
, vol.50
, pp. 4602-4605
-
-
Kotani, S.1
Shimoda, Y.2
Sugiura, M.3
Nakajima, M.4
-
13
-
-
67649664205
-
-
Shimoda, Y.; Tando, T.; Kotani, S.; Sugiura, M.; Nakajima, M. Tetrahedron: Asymmetry 2009, 20, 1369-1370
-
(2009)
Tetrahedron: Asymmetry
, vol.20
, pp. 1369-1370
-
-
Shimoda, Y.1
Tando, T.2
Kotani, S.3
Sugiura, M.4
Nakajima, M.5
-
14
-
-
77749296044
-
-
Sugiura, M.; Sato, N.; Sonoda, Y.; Kotani, S.; Nakajima, M. Chem. Asian J. 2010, 5, 478-781.
-
(2010)
Chem. Asian J.
, vol.5
, pp. 478-781
-
-
Sugiura, M.1
Sato, N.2
Sonoda, Y.3
Kotani, S.4
Nakajima, M.5
-
15
-
-
33646555477
-
-
For reviews on Lewis base catalysis, see: Orito, Y.; Nakajima, M. Synthesis 2006, 1391-1401
-
(2006)
Synthesis
, pp. 1391-1401
-
-
Orito, Y.1
Nakajima, M.2
-
19
-
-
33947231700
-
-
For reviews, see: Pellissier, H. Tetrahedron 2007, 63, 3235-3285
-
(2007)
Tetrahedron
, vol.63
, pp. 3235-3285
-
-
Pellissier, H.1
-
22
-
-
0034112410
-
-
Merino, P.; Franco, S.; Merchan, F. L.; Tejero, T. Synlett 2000, 442-454
-
(2000)
Synlett
, pp. 442-454
-
-
Merino, P.1
Franco, S.2
Merchan, F.L.3
Tejero, T.4
-
24
-
-
33947400150
-
-
For recent examples of nitrone ligands for metal-catalysts, see: Yao, Q.; Zabawa, M.; Woo, J.; Zheng, C. J. Am. Chem. Soc. 2007, 129, 3088-3089
-
(2007)
J. Am. Chem. Soc.
, vol.129
, pp. 3088-3089
-
-
Yao, Q.1
Zabawa, M.2
Woo, J.3
Zheng, C.4
-
25
-
-
66349124674
-
-
Zhang, Y.; Song, G.; Ma, G.; Zhao, J.; Pan, C.-L.; Li, X. Organometllics 2009, 28, 3233-3238.
-
(2009)
Organometllics
, vol.28
, pp. 3233-3238
-
-
Zhang, Y.1
Song, G.2
Ma, G.3
Zhao, J.4
Pan, C.-L.5
Li, X.6
-
26
-
-
67649976824
-
-
C2-Symmetrical bisimidazole N,N0-dioxides derived from 1,2- cyclohaxanediamine have recently been reported as Lewis base catalysts for enantioselective allylation, see: Kwiatkowski, P.; Mucha, P.; Mloston , G.; Jurczak, J. Synlett 2009, 1757-1760.
-
Synlett
, vol.2009
, pp. 1757-1760
-
-
Kwiatkowski, P.1
Mucha, P.2
Mloston, G.3
Jurczak, J.4
-
27
-
-
22744455748
-
-
Zhang, W.; Basak, A.; Kosugi, Y.; Hoshino, Y.; Yamamoto, H. Angew. Chem., Int. Ed. 2005, 44, 4389-4391.
-
(2005)
Angew. Chem., Int. Ed.
, vol.44
, pp. 4389-4391
-
-
Zhang, W.1
Basak, A.2
Kosugi, Y.3
Hoshino, Y.4
Yamamoto, H.5
-
28
-
-
85030578274
-
-
Note
-
General procedure for preparation of dinitrones: To (S,S)-N,N- dihydroxyl1-1,2-cyclohexanediamine dihydrochloride7 (0.5 mmol), dichloromethane (10 mL), NaHCO3 (252 mg, 6 equiv), and an aldehyde (1.5 mmol) were added at room temperature. The reaction mixture was refluxed for 6 h, filtered, and evaporated. The residue was purified by silica gel column chromatography (hexane/acetone or dichloromethane/EtOH) to give a dinitrone.
-
-
-
-
29
-
-
33751157465
-
-
Leading references on enantioselective allylation of aldehydes with allyltrichlorosilanes catalyzed by various types of chiral Lewis bases. For chiral phosphoramides
-
Leading references on enantioselective allylation of aldehydes with allyltrichlorosilanes catalyzed by various types of chiral Lewis bases. For chiral phosphoramides, see: Denmark, S. E.; Coe D. M.; Pratt, N. E.; Griedel, B. D. J. Org. Chem. 1994, 59 6161-6163
-
(1994)
J. Org. Chem.
, vol.59
, pp. 6161-6163
-
-
Denmark, S.E.1
Coe, D.M.2
Pratt, N.E.3
Griedel, B.D.4
-
30
-
-
33644532245
-
-
Denmark, S. E.; Fu, J.; Lawler, M. J. J. Org. Chem. 2006, 71, 1523-1536
-
(2006)
J. Org. Chem.
, vol.71
, pp. 1523-1536
-
-
Denmark, S.E.1
Fu, J.2
Lawler, M.J.3
-
31
-
-
85030582784
-
-
For chiral pyridine N-oxides, see: Ref. 2a
-
For chiral pyridine N-oxides, see: Ref. 2a.
-
-
-
-
32
-
-
0001056484
-
-
Malkov, A. V.; Orsini, M.; Pernazza, D.; Muir, K. W.; Langer, V.; Meghani, P.; Kocovský, P. Org. Lett. 2002, 4, 1047-1049
-
(2002)
Org. Lett.
, vol.4
, pp. 1047-1049
-
-
Malkov, A.V.1
Orsini, M.2
Pernazza, D.3
Muir, K.W.4
Langer, V.5
Meghani, P.6
Kocovský, P.7
-
33
-
-
0000761076
-
-
Shimada, T.; Kina, A.; Ikeda, S.; Hayashi, T. Org. Lett. 2002, 4, 2799-2801
-
(2002)
Org. Lett.
, vol.4
, pp. 2799-2801
-
-
Shimada, T.1
Kina, A.2
Ikeda, S.3
Hayashi, T.4
-
34
-
-
23044461118
-
-
Malkov, A. V.; Bell, M.; Castelluzzo, F.; Kocovský, P. Org. Lett. 2005, 7, 3219-3222
-
(2005)
Org. Lett.
, vol.7
, pp. 3219-3222
-
-
Malkov, A.V.1
Bell, M.2
Castelluzzo, F.3
Kocovský, P.4
-
35
-
-
33750968173
-
-
Chai, Q.; Song, C.; Sun, Z.; Ma, Y.; Ma, C.; Dai, Y.; Andrus, M. B. Tetrahedron Lett. 2006, 47, 8611-8615
-
(2006)
Tetrahedron Lett.
, vol.47
, pp. 8611-8615
-
-
Chai, Q.1
Song, C.2
Sun, Z.3
Ma, Y.4
Ma, C.5
Dai, Y.6
Andrus, M.B.7
-
36
-
-
67549094808
-
-
Kadlcikova, A.; Hrdina, R.; Valterova, I.; Kotora, M. Adv. Synth. Catal. 2009, 351, 1279-1283
-
(2009)
Adv. Synth. Catal.
, vol.351
, pp. 1279-1283
-
-
Kadlcikova, A.1
Hrdina, R.2
Valterova, I.3
Kotora, M.4
-
37
-
-
0032580431
-
-
For chiral formamides, see: Iseki, K.; Mizuno, S.; Kuroki, Y.; Kobayashi, Y. Tetrahedron Lett. 1998, 39, 2767-2770
-
(1998)
Tetrahedron Lett.
, vol.39
, pp. 2767-2770
-
-
Iseki, K.1
Mizuno, S.2
Kuroki, Y.3
Kobayashi, Y.4
-
38
-
-
0041508449
-
-
For chiral sulfoxides, see: Massa, A.; Malkov, A. V.; Kocovský , P.; Scettri, A. Tetrahedron Lett. 2003, 44, 7179-7181
-
(2003)
Tetrahedron Lett.
, vol.44
, pp. 7179-7181
-
-
Massa, A.1
Malkov, A.V.2
Kocovský, P.3
Scettri, A.4
-
40
-
-
85030588949
-
-
For chiral phosphine oxides, see: Ref. 2c
-
For chiral phosphine oxides, see: Ref. 2c.
-
-
-
-
41
-
-
53849127182
-
-
Simonini, V.; Benaglia, M.; Benincori, T. Adv. Synth. Catal. 2008, 350, 561-564
-
(2008)
Adv. Synth. Catal.
, vol.350
, pp. 561-564
-
-
Simonini, V.1
Benaglia, M.2
Benincori, T.3
-
42
-
-
23044493928
-
-
For chiral pyrrolidine Noxides, see: Traverse, J. F.; Zhao, Y.; Hoveyda, A. H.; Snapper, M. L. Org. Lett. 2005, 7, 3151-3154
-
(2005)
Org. Lett.
, vol.7
, pp. 3151-3154
-
-
Traverse, J.F.1
Zhao, Y.2
Hoveyda, A.H.3
Snapper, M.L.4
-
43
-
-
42949174241
-
-
Simonini, V.; Benaglia, M.; Pignataro, L.; Guizzetti, S.; Celentano, G. Synlett 2008, 1061-1065.
-
(2008)
Synlett
, pp. 1061-1065
-
-
Simonini, V.1
Benaglia, M.2
Pignataro, L.3
Guizzetti, S.4
Celentano, G.5
-
44
-
-
0033617135
-
-
DMPU and chiral urea derivatives have been used for allylation with allyltrichlorosilane, see: Chataigner, I.; Piarulli, U.; Gennari, C. Tetrahedron Lett. 1999, 40, 3633-3634.
-
(1999)
Tetrahedron Lett.
, vol.40
, pp. 3633-3634
-
-
Chataigner, I.1
Piarulli, U.2
Gennari, C.3
-
45
-
-
85030580658
-
-
HMPA has been used as an effective achiral additive for enantioselective allylation catalyzed by chiral formamides, see: Ref. 9i
-
HMPA has been used as an effective achiral additive for enantioselective allylation catalyzed by chiral formamides, see: Ref. 9i.
-
-
-
-
46
-
-
85030579019
-
-
Catalyst 1a (Table 3, entry 1) and 1f (entry 10) were recovered in 99% and 93%, respectively
-
Catalyst 1a (Table 3, entry 1) and 1f (entry 10) were recovered in 99% and 93%, respectively.
-
-
-
-
47
-
-
85030574289
-
-
Note
-
General procedure for allylation of aldehydes with allyltrichlorosilanes: to a solution of dinitrone 1f (20 mol %), an aldehyde 2 (0.4 mmol), and DMPU (1.5 equiv) in chloroform (1 mL) was added allyltrichlorosilane (1.5 equiv) under argon at room temperature. After being stirred at that temperature for 24 h, the reaction was quenched with satd aqueous NaHCO3 (10 mL), and the slurry was stirred for 1 h. The mixture was filtered through cotton wool and extracted with ethyl acetate (3- 15 mL). The combined organic layers were washed with brine (1- 30 mL), dried over MgSO4, filtered, and concentrated under vacuum. The crude product was purified by silica gel column chromatography (hexane/ ethyl acetate) to give the product The enantiomeric excess was determined by HPLC analysis.
-
-
-
-
48
-
-
0037073229
-
-
Low reactivity of non-conjugated aldehydes has been observed for Lewis basecatalyzed reactions with trichlorosilylated reagents. This result has been ascribed to the formation of the corresponding O-silylated chlorohydrins
-
Low reactivity of non-conjugated aldehydes has been observed for Lewis basecatalyzed reactions with trichlorosilylated reagents. This result has been ascribed to the formation of the corresponding O-silylated chlorohydrins, see: Denmark, S. E.; Wynn, T.; Beutner, G. L. J. Am. Chem. Soc. 2002, 124, 13405-13407.
-
(2002)
J. Am. Chem. Soc.
, vol.124
, pp. 13405-13407
-
-
Denmark, S.E.1
Wynn, T.2
Beutner, G.L.3
|