-
4
-
-
0032538355
-
-
Review: Renaud, P.; Gerster, M. Angew. Chem., Int. Ed. Engl. 1998, 37, 2562-2579.
-
(1998)
Angew. Chem., Int. Ed. Engl.
, vol.37
, pp. 2562-2579
-
-
Renaud, P.1
Gerster, M.2
-
5
-
-
0032536002
-
-
Chiral bisoxazoline-metal complexes in asymmetric synthesis: Ghosh, A. K.; Mathivanan, P.; Cappiello, J. Tetrahedron: Asymmetry 1998, 9, 1-45.
-
(1998)
Tetrahedron: Asymmetry
, vol.9
, pp. 1-45
-
-
Ghosh, A.K.1
Mathivanan, P.2
Cappiello, J.3
-
6
-
-
0029804421
-
-
Oxazolidinone templates: (a) Sibi, M. P.; Ji, J. G.; Wu, J. H.; Gürtler, S.; Porter, N. A. J. Am. Chem. Soc. 1996, 118, 9200-9201;
-
(1996)
J. Am. Chem. Soc.
, vol.118
, pp. 9200-9201
-
-
Sibi, M.P.1
Ji, J.G.2
Wu, J.H.3
Gürtler, S.4
Porter, N.A.5
-
8
-
-
33748653804
-
-
(c) Tararov, V. I.; Kuznetzov, N. Y.; Bakhmutov, V. I.; Ikonnikov, N. S.; Bubnov, Y. N.; Khrustalev, V. N.; Saveleva, T. F.; Belokon, Y N. J. Chem. Soc., Perkin Trans. 1 1997, 3101-3106;
-
(1997)
J. Chem. Soc., Perkin Trans. 1
, pp. 3101-3106
-
-
Tararov, V.I.1
Kuznetzov, N.Y.2
Bakhmutov, V.I.3
Ikonnikov, N.S.4
Bubnov, Y.N.5
Khrustalev, V.N.6
Saveleva, T.F.7
Belokon, Y.N.8
-
9
-
-
0031585075
-
-
pyrazole templates
-
(d) Wu, J. H.; Zhang, G. R.; Porter, N. A. Tetrahedron Lett. 1997, 38, 2067-2070; pyrazole templates:
-
(1997)
Tetrahedron Lett.
, vol.38
, pp. 2067-2070
-
-
Wu, J.H.1
Zhang, G.R.2
Porter, N.A.3
-
10
-
-
0030873409
-
-
(e) Sibi, M. P.; Shay, J. J.; Ji, J. G. Tetrahedron Lett. 1997, 38, 5955-5958.
-
(1997)
Tetrahedron Lett.
, vol.38
, pp. 5955-5958
-
-
Sibi, M.P.1
Shay, J.J.2
Ji, J.G.3
-
11
-
-
0001929811
-
-
Davies, I. W.; Gerena, L.; Castonguay, L.; Senanayake, C. H.; Larsen, R. D.; Verhoeven, T. R.; Reider, P. J. J. Chem. Soc., Chem. Commun. 1996, 1753.
-
(1996)
J. Chem. Soc., Chem. Commun.
, pp. 1753
-
-
Davies, I.W.1
Gerena, L.2
Castonguay, L.3
Senanayake, C.H.4
Larsen, R.D.5
Verhoeven, T.R.6
Reider, P.J.7
-
12
-
-
0001696290
-
-
(a) Kanemasa, S.; Oderaotoshi, Y.; Yamamoto, H.; Tanaka, J.; Wada, E.; Curran, D. P. J. Org. Chem. 1997, 62, 6454-6455;
-
(1997)
J. Org. Chem.
, vol.62
, pp. 6454-6455
-
-
Kanemasa, S.1
Oderaotoshi, Y.2
Yamamoto, H.3
Tanaka, J.4
Wada, E.5
Curran, D.P.6
-
13
-
-
0032495777
-
-
(b) Kanemasa, S.; Oderaotoshi, Y.; Sakaguchi, S.; Yamamoto, H.; Tanaka, J.; Wada, E.; Curran, D. P. J. Am. Chem. Soc. 1998, 120, 3074-3088;
-
(1998)
J. Am. Chem. Soc.
, vol.120
, pp. 3074-3088
-
-
Kanemasa, S.1
Oderaotoshi, Y.2
Sakaguchi, S.3
Yamamoto, H.4
Tanaka, J.5
Wada, E.6
Curran, D.P.7
-
14
-
-
0032477318
-
-
(c) Kanemasa, S.; Oderaotoshi, Y.; Tanaka, J.; Wada, E. J. Am. Chem. Soc. 1998, 120, 12355-12356.
-
(1998)
J. Am. Chem. Soc.
, vol.120
, pp. 12355-12356
-
-
Kanemasa, S.1
Oderaotoshi, Y.2
Tanaka, J.3
Wada, E.4
-
15
-
-
0032497663
-
-
Kanemasa, S.; Oderaotoshi, Y.; Tanaka, J.; Wada, E. Tetrahedron Lett. 1998, 39, 7521-7524.
-
(1998)
Tetrahedron Lett.
, vol.39
, pp. 7521-7524
-
-
Kanemasa, S.1
Oderaotoshi, Y.2
Tanaka, J.3
Wada, E.4
-
17
-
-
84987472013
-
-
(b) Müller, D.; Umbricht, G.; Weber, B.; Pfaltz, A. Helv. Chim. Acta 1991, 74, 232-240.
-
(1991)
Helv. Chim. Acta
, vol.74
, pp. 232-240
-
-
Müller, D.1
Umbricht, G.2
Weber, B.3
Pfaltz, A.4
-
18
-
-
0011034289
-
-
Preparation of the 4,6-diiodide 12, dinitrile 13, and diethyl ester 14 of dibenzofuran has been previously described: Tsang, K. Y.; Diaz, H.; Graciani, N.; Kelly, J. W. J. Am. Chem. Soc. 1994, 116, 3988-4005. Elaboration of diacid 9, dinitrile 13, diester 14, and diimidate 15 to the desired dihydroxy diamide 11 or DBFOX 6 was prevented by marginal solubility of starting materials or reaction intermediates. (equation presented)
-
(1994)
J. Am. Chem. Soc.
, vol.116
, pp. 3988-4005
-
-
Tsang, K.Y.1
Diaz, H.2
Graciani, N.3
Kelly, J.W.4
-
19
-
-
0344185922
-
-
note
-
3BnCl). The better solubility of the crude diacid 9, prepared from carboxylation, may account for this difference.
-
-
-
-
20
-
-
0344185920
-
-
note
-
(Diethylamino)sulfur trifluoride (DAST) is more stable and cheaper (US$2.76/mmol, Aldrich) than the Burgess reagent (US$10.38/mmol, Aldrich).
-
-
-
-
21
-
-
0000074104
-
-
N2 mechanism to give methyl urethanes in good yield. See (a) Burgess, E. M.; Penton, H. R.; Taylor, E. A.; Williams, W. M. Organic Syntheses, Coll. Vol. 6 1988, 788-791; (b) Burgess, E. M.; Penton, H. R.; Taylor, E. A. J. Org. Chem. 1973, 38, 26-31.
-
(1988)
Organic Syntheses, Coll. Vol. 6
, vol.6
, pp. 788-791
-
-
Burgess, E.M.1
Penton, H.R.2
Taylor, E.A.3
Williams, W.M.4
-
22
-
-
33947087514
-
-
N2 mechanism to give methyl urethanes in good yield. See (a) Burgess, E. M.; Penton, H. R.; Taylor, E. A.; Williams, W. M. Organic Syntheses, Coll. Vol. 6 1988, 788-791; (b) Burgess, E. M.; Penton, H. R.; Taylor, E. A. J. Org. Chem. 1973, 38, 26-31.
-
(1973)
J. Org. Chem.
, vol.38
, pp. 26-31
-
-
Burgess, E.M.1
Penton, H.R.2
Taylor, E.A.3
-
23
-
-
0029156882
-
-
Denmark, S. E.; Nakajima, N.; Nicaise, O. J. C.; Faucher, A.-M.; Edwards, J. P. J. Org. Chem. 1995, 60, 4884-4892.
-
(1995)
J. Org. Chem.
, vol.60
, pp. 4884-4892
-
-
Denmark, S.E.1
Nakajima, N.2
Nicaise, O.J.C.3
Faucher, A.-M.4
Edwards, J.P.5
-
24
-
-
0344185918
-
-
3, rfx, 88%;
-
3N.
-
-
-
-
25
-
-
0345048198
-
-
2, 25°C;
-
3N.
-
-
-
-
26
-
-
0345479695
-
-
2;
-
3N.
-
-
-
-
27
-
-
0344185917
-
-
3CN, 80°C;
-
3N.
-
-
-
-
28
-
-
0344185916
-
-
nBuLi; then 17, rfx;
-
3N.
-
-
-
-
29
-
-
0345479694
-
-
2O, then 18, 25°C;
-
3N.
-
-
-
-
30
-
-
0345048196
-
-
3N
-
3N.
-
-
-
-
31
-
-
0344185915
-
-
note
-
2 with the appropriate Ag(I) salt, AgCl or AgBr precipitated out immediately.
-
-
-
-
32
-
-
0000953079
-
-
We are grateful to Professor X. Zhang, Penn State University, for suggesting this improved protocol. For double deprotonation see: (a) Haenel, M. W.; Jakubik, D.; Rothenburger, E.; Schroth, G. Chem. Ber. 1991, 124, 1705-1710; (b) Jean, F.; Melnyk, O.; Tartar, A. Tetrahedron Lett. 1995, 36, 7657-7660.
-
(1991)
Chem. Ber.
, vol.124
, pp. 1705-1710
-
-
Haenel, M.W.1
Jakubik, D.2
Rothenburger, E.3
Schroth, G.4
-
33
-
-
0028863954
-
-
We are grateful to Professor X. Zhang, Penn State University, for suggesting this improved protocol. For double deprotonation see: (a) Haenel, M. W.; Jakubik, D.; Rothenburger, E.; Schroth, G. Chem. Ber. 1991, 124, 1705-1710; (b) Jean, F.; Melnyk, O.; Tartar, A. Tetrahedron Lett. 1995, 36, 7657-7660.
-
(1995)
Tetrahedron Lett.
, vol.36
, pp. 7657-7660
-
-
Jean, F.1
Melnyk, O.2
Tartar, A.3
-
35
-
-
0030984060
-
-
Gel formation was also observed by other researchers: Takacs, J. M.; Quincy, D. A.; Shay, W.; Jones, B. E.; Ross, C. R. Tetrahedron: Asymmetry 1997, 8, 3079-3087.
-
(1997)
Tetrahedron: Asymmetry
, vol.8
, pp. 3079-3087
-
-
Takacs, J.M.1
Quincy, D.A.2
Shay, W.3
Jones, B.E.4
Ross, C.R.5
-
36
-
-
0002780124
-
-
Burgess reagent was prepared on a 20 g scale: Burgess, E. M.; Penton, H. R.; Taylor, E. A.; Williams, W. M. Org. Synth. 1977, 56, 40-43.
-
(1977)
Org. Synth.
, vol.56
, pp. 40-43
-
-
Burgess, E.M.1
Penton, H.R.2
Taylor, E.A.3
Williams, W.M.4
-
37
-
-
33845280186
-
-
(a) Evans, D. A.; Chapman, K. T.; Bisaha, J. J. Am. Chem. Soc. 1988, 110, 1238-1256;
-
(1988)
J. Am. Chem. Soc.
, vol.110
, pp. 1238-1256
-
-
Evans, D.A.1
Chapman, K.T.2
Bisaha, J.3
-
38
-
-
0029804421
-
-
supporting information
-
(b) Sibi, M. P.; Ji, J. G.; Wu, J. H.; Gurtler, S.; Porter, N. A. J. Am. Chem. Soc. 1996, 118, 9200-9201 (supporting information).
-
(1996)
J. Am. Chem. Soc.
, vol.118
, pp. 9200-9201
-
-
Sibi, M.P.1
Ji, J.G.2
Wu, J.H.3
Gurtler, S.4
Porter, N.A.5
-
41
-
-
33845280186
-
-
(a) Evans, D. A.; Chapman, K. T.; Bisaha, J. J. Am. Chem. Soc. 1988, 110, 1238-1256;
-
(1988)
J. Am. Chem. Soc.
, vol.110
, pp. 1238-1256
-
-
Evans, D.A.1
Chapman, K.T.2
Bisaha, J.3
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