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(a) Camptothecin: New Anticancer Agents, Potmesil, M. and Pinedo, H., Eds.; CRC, Boca Raton, FL, 1995.
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15
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0343682449
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note
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In the series of N-TBDPS- and N-Boc-4-methyl-6-bromo-2-pyridone derivatives, we had seen that the 4-methyl group can be quantitatively alkylated with LDA/EtI. Similarly, a preliminary experiment with the TPDPS-protected 8 showed that alkylation with LDA/EtI at 0 °C provided selectively the 4-isobutyl derivative (data not shown).
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16
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0026501469
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Mergelsberg, I.; Gala, D.; Scherer, D.; DiBenedetto, D.; Tanner, M. Tetrahedron Lett. 1992, 33, 161.
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Mergelsberg, I.1
Gala, D.2
Scherer, D.3
DiBenedetto, D.4
Tanner, M.5
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17
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0028869222
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Leading references: (a) Davis, F. A.; Reddy, G. V.; Chen, B.-C.; Kumar, A.; Haque, M. S. J. Org. Chem. 1995, 60, 6148. (b) Davis, F. A.; Chen, B.-C. Chem. Rev. 1992, 92, 919. Other recent examples: (c) Ma, L.; Dolphin, D. Tetrahedron: Asymm. 1995, 6, 313. (d) Davis, F. A.; Kumar, A.; Reddy, R. E.; Chen, B.-C.; Wade, P. A.; Shah, S. W. J. Org. Chem. 1993, 58, 7591.
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Davis, F.A.1
Reddy, G.V.2
Chen, B.-C.3
Kumar, A.4
Haque, M.S.5
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18
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0000043848
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Other recent examples
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Leading references: (a) Davis, F. A.; Reddy, G. V.; Chen, B.-C.; Kumar, A.; Haque, M. S. J. Org. Chem. 1995, 60, 6148. (b) Davis, F. A.; Chen, B.-C. Chem. Rev. 1992, 92, 919. Other recent examples: (c) Ma, L.; Dolphin, D. Tetrahedron: Asymm. 1995, 6, 313. (d) Davis, F. A.; Kumar, A.; Reddy, R. E.; Chen, B.-C.; Wade, P. A.; Shah, S. W. J. Org. Chem. 1993, 58, 7591.
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Chem. Rev.
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Davis, F.A.1
Chen, B.-C.2
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19
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0028948016
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Leading references: (a) Davis, F. A.; Reddy, G. V.; Chen, B.-C.; Kumar, A.; Haque, M. S. J. Org. Chem. 1995, 60, 6148. (b) Davis, F. A.; Chen, B.-C. Chem. Rev. 1992, 92, 919. Other recent examples: (c) Ma, L.; Dolphin, D. Tetrahedron: Asymm. 1995, 6, 313. (d) Davis, F. A.; Kumar, A.; Reddy, R. E.; Chen, B.-C.; Wade, P. A.; Shah, S. W. J. Org. Chem. 1993, 58, 7591.
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Tetrahedron: Asymm.
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Ma, L.1
Dolphin, D.2
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20
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0027756956
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Leading references: (a) Davis, F. A.; Reddy, G. V.; Chen, B.-C.; Kumar, A.; Haque, M. S. J. Org. Chem. 1995, 60, 6148. (b) Davis, F. A.; Chen, B.-C. Chem. Rev. 1992, 92, 919. Other recent examples: (c) Ma, L.; Dolphin, D. Tetrahedron: Asymm. 1995, 6, 313. (d) Davis, F. A.; Kumar, A.; Reddy, R. E.; Chen, B.-C.; Wade, P. A.; Shah, S. W. J. Org. Chem. 1993, 58, 7591.
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J. Org. Chem.
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Davis, F.A.1
Kumar, A.2
Reddy, R.E.3
Chen, B.-C.4
Wade, P.A.5
Shah, S.W.6
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21
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0028838528
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Curran, D. P.; Liu, H.; Ko, S.-B; Josien, H. Tetrahedron Lett. 1995, 36, 8917.
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(1995)
Tetrahedron Lett.
, vol.36
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Curran, D.P.1
Liu, H.2
Ko, S.-B.3
Josien, H.4
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22
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0342812172
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note
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No propargylation of the alcohol side-chain was observed.
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