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4
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Vilsmaier, E.1
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5
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17544388904
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Some recent examples: (a) Bégis, G.; Cladingboel, D.; Motherwell, W. B. Chem. Commun. 2003, 2656.
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Some recent examples: (a) Bégis, G.; Cladingboel, D.; Motherwell, W. B. Chem. Commun. 2003, 2656.
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8
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33751287928
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(d) Tanguy, C.; Bertus, P.; Szymoniak, J.; Larionov, O. V.; de Meijere, A. Synlett 2006, 3164.
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Tanguy, C.1
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13
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(a) Chaplinski, V.; de Meijere, A. Angew. Chem., Int. Ed. Engl. 1996, 35, 413.
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Chaplinski, V.1
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2542493171
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de Meijere, A.1
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15
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85002338759
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(a) Kulinkovich, O. G.; Savchenko, A. I.; Sviridov, S. V.; Vasilevski, D. A. Mendeleev Commun. 1993, 230.
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Kulinkovich, O.G.1
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17
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(c) Lee, J.; Kang, C. H.; Kim, H.; Cha, J. K. J. Am. Chem. Soc. 1996, 118, 291.
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Lee, J.1
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19
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Laroche, C.; Bertus, P.; Szymoniak, J. Tetrahedron Lett. 2003, 44, 2485.
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Laroche, C.1
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20
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54249104220
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PhD Thesis; Université de Reims: France
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Laroche, C. PhD Thesis; Université de Reims: France, 2006.
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(2006)
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Laroche, C.1
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22
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0037124795
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(b) Quan, L. G.; Kim, S.-H.; Lee, J. C.; Cha, J. K. Angew. Chem. Int. Ed. 2002, 41, 2160.
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Quan, L.G.1
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Cha, J.K.4
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23
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-
0141854105
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-
For related Ti-mediated coupling of homoallylic alcohols, see: c
-
For related Ti-mediated coupling of homoallylic alcohols, see: (c) Sung, M. J.; Pang, J.-H.; Park, S.-B.; Cha, J. K. Org. Lett. 2003, 5, 2137.
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Sung, M.J.1
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26
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43849109354
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Bobrov, D. N.; Kim, K.; Cha, J. K. Tetrahedron Lett. 2008, 49, 4089.
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Bobrov, D.N.1
Kim, K.2
Cha, J.K.3
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27
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-
54249086310
-
-
6): δ = 26.98, 38.50, 74.70, 76.94, 116.48, 136.41.
-
6): δ = 26.98, 38.50, 74.70, 76.94, 116.48, 136.41.
-
-
-
-
28
-
-
54249084138
-
-
General Procedure for the MeTi(Oi-Pr) 3-Mediated Cyclopropanation of Homoallylic Alcohols and Nitriles To a solution (under argon) of nitrile (1 mmol) and homoallylic alcohol (1.2 mmol) in THF (10 mL) was added dropwise MeTi(Oi-Pr)3 (1.2 mmol, 0.29 mL) and the reaction was stirred for 30 min. A solution of cyclohexyl magnesium chloride (2.4 mmol, 1.2 mL, 2 M in Et2O) was added dropwise to the mixture and was stirred for 90 min, Chemical Equation Presented) Water (5 mL) was added followed by EtOAc (10 mL, The product was extracted with EtOAc 3 x 10 mL, The combined extracts were dried over MgSO4. After evaporation of the solvent, the product was purified by flash chromatography on SiO2 to give 3a-i or 6a-f
-
2 to give 3a-i or 6a-f.
-
-
-
-
29
-
-
54249132229
-
-
+: 192.1388; found: 192.1383.
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+: 192.1388; found: 192.1383.
-
-
-
-
30
-
-
54249098758
-
-
In contrast, similar cyclopropanation of substituted homoallylic alcohols and carboxylic esters occurs with good 1,3-diastereoselection, see ref. 10b
-
In contrast, similar cyclopropanation of substituted homoallylic alcohols and carboxylic esters occurs with good 1,3-diastereoselection, see ref. 10b.
-
-
-
-
31
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-
36849035784
-
-
For a recent review devoted to aminocyclopropane-carboxylic acid derivatives, see
-
For a recent review devoted to aminocyclopropane-carboxylic acid derivatives, see: Brackmann, F.; de Meijere, A. Chem. Rev. 2007, 107, 4493.
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Chem. Rev
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, pp. 4493
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Brackmann, F.1
de Meijere, A.2
-
32
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-
0001480961
-
-
For preceding syntheses of 2,3-methanoglutamic acid derivatives, see: a
-
For preceding syntheses of 2,3-methanoglutamic acid derivatives, see: (a) Wakamiya, T.; Oda, Y.; Fujita, H.; Shiba, T. Tetrahedron Lett. 1986, 27, 2143.
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(1986)
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Wakamiya, T.1
Oda, Y.2
Fujita, H.3
Shiba, T.4
-
33
-
-
0011901717
-
-
(b) Mapelli, C.; Elrod, E. F.; Holt, E. M.; Stammer, C. H. Tetrahedron 1989, 45, 4377.
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(1989)
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, pp. 4377
-
-
Mapelli, C.1
Elrod, E.F.2
Holt, E.M.3
Stammer, C.H.4
-
34
-
-
0025058618
-
-
(c) Slama, J. T.; Satsangi, R. K.; Simmons, A.; Lynch, V.; Bolger, R. E.; Suttie, J. J. Med. Chem. 1990, 33, 824.
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-
Slama, J.T.1
Satsangi, R.K.2
Simmons, A.3
Lynch, V.4
Bolger, R.E.5
Suttie, J.6
-
40
-
-
54249083215
-
-
Selected Data of 1-[2-Hydroxy-2-(2-methoxyphenyl)-ethyl]-4-azaspiro[2. 4]heptan-5-one (6f) Minor diastereomer: 1H NMR (250 MHz, MeOD, δ, 0.49 (t, J, 6.0 Hz, 1 H, 0.76 (dd, J, 9.6, 6.0 Hz, 1 H, 1.00 (ddd, J, 9.5, 6.6, 4.4 Hz, 1 H, 1.62 (ddd, J, 14.0, 9.5, 5.8 Hz, 1 H, 1.81-1.85 (m, 1 H, 1.93 (ddd, J, 14.0, 7.6, 4.4 Hz, 1 H, 2.15-2.24 (m, 3 H, 3.84 (s, 3 H, 5.04 (dd, J, 7.6, 5.8 Hz, 1 H, 6.88-6.96 (m, 2 H, 7.21 (td, J, 7.5, 1.4 Hz, 1 H, 7.38 (dd, J, 7.5, 1.4 Hz, 1 H, 13C NMR (62.9 MHz, MeOD, δ, 15.5, 21.4, 31.5, 31.7, 38.0, 44.7, 55.8, 69.7, 111.3, 121.5, 127.6, 129.2, 133.9, 157.6, 180.4. IR (KBr, 3420, 2523, 2076, 1651, 1457, 1117 cm-1. Major diastereomer: 1H NMR (250 MHz, MeOD, δ, 0.41 (t, J, 6 Hz, 1 H, 0.70 (dd, J, 9.5, 6.0 Hz, 1 H, 0.89-0.95 (m, 1 H, 1.64-1.68 (m, 1 H, 1.83 ddd, J, 14.3, 8.8, 5.5 Hz, 1 H
-
+: 192.1443; found: 192.1442.
-
-
-
-
41
-
-
0037123423
-
-
The tricyclic framework of 7 is rare in the literature, see: (a) Hanessian, S.; Buckle, R.; Bayrakdarian, M. J. Org. Chem. 2002, 67, 3387.
-
The tricyclic framework of 7 is rare in the literature, see: (a) Hanessian, S.; Buckle, R.; Bayrakdarian, M. J. Org. Chem. 2002, 67, 3387.
-
-
-
-
42
-
-
0028353637
-
-
(b) Beak, P.; Wu, S.; Yum, E. K.; Jun, Y. M. J. Org. Chem. 1994, 59, 276.
-
(1994)
J. Org. Chem
, vol.59
, pp. 276
-
-
Beak, P.1
Wu, S.2
Yum, E.K.3
Jun, Y.M.4
-
43
-
-
33847793194
-
-
The pyrrolizidine analogue 7 was recently obtained by Ti-mediated cyclopropanation of unsaturated imides, see: Bertus, P.; Szymoniak, J. Org. Lett. 2007, 9, 659.
-
The pyrrolizidine analogue 7 was recently obtained by Ti-mediated cyclopropanation of unsaturated imides, see: Bertus, P.; Szymoniak, J. Org. Lett. 2007, 9, 659.
-
-
-
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