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Yamaguchi, M.1
Tsukamoto, M.2
Tanaka, S.3
Hirao, I.4
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77
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0344703854
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note
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Either anti (see refs 2a, 6c,d, 13e,f, and 15a) or syn (see refs 4c and 13a) selective Michael additions of glycine synthon anions to different α,β-unsaturated esters have been previously observed. As indicated in ref 13a these opposite results could be related with the structure of the glycine enolate reacting either as a 2-azaallylanion, which led to the anti adduct, or as an 1-oxaallylanion leading to the syn adduct when no possibility of formation of the 2-azaallylanion structure exists.
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81
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0009078022
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Sabaté, R.; Schick, U.; Moretó, J. M.; Ricart, S. Organometallics 1996, 15, 3611.
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(1996)
Organometallics
, vol.15
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Sabaté, R.1
Schick, U.2
Moretó, J.M.3
Ricart, S.4
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82
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4243761172
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Söderberg, B. C.; Hegedus, L. S.; Sierra, M. A. J. Am. Chem. Soc. 1990, 112, 4364.
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(1990)
J. Am. Chem. Soc.
, vol.112
, pp. 4364
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Söderberg, B.C.1
Hegedus, L.S.2
Sierra, M.A.3
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84
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0000015690
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Banfi, L.; Cardani, S.; Potenza, D.; Scolastico, C. Tetrahedron 1987, 43, 2317.
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(1987)
Tetrahedron
, vol.43
, pp. 2317
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Banfi, L.1
Cardani, S.2
Potenza, D.3
Scolastico, C.4
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85
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0345378631
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Djuric, S.; Venit, J.; Magnus, P. Tetrahedron Lett. 1981, 22, 1787.
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(1981)
Tetrahedron Lett.
, vol.22
, pp. 1787
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Djuric, S.1
Venit, J.2
Magnus, P.3
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87
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0344703853
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note
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3N (2.5 equiv) in THF, 30 min, 25 °C, quantitative yield, and hydrogenation of compound 9f (5% Pd/ C, 30% weight) in EtOAc, 15 h, 25 °C, 65% yield.
-
-
-
-
88
-
-
0345565988
-
-
note
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-3 in 6 M HCl) = +11.1.
-
-
-
-
89
-
-
0345134432
-
-
note
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-3 in 6 M HCl) = +19.15.
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