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1642339008
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Upon treatment with NaH at room temperature, N-(tert-butoxycatbonyl)-2- (1-phenylsulfonylpropa-1,2-dien-1-yl)aniline underwent the endomode ring-closing reaction to furnish the corresponding indole derivative in a high yield. Mukai, C.; Kobayashi, M.; Kubota, S.; Takahashi, Y.; Kitagaki, S. J. Org. Chem. 2004, 69, 2128-2136.
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44
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30144436311
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note
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3-position, which must be useful for further elaborations such as the carbon homologation reaction, if the reaction proceeded as planned.
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45
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0000356370
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All allenes used in this study were prepared by the method of Marshall, see: (a) Marshall, J. A.; Wang, X.-j. J. Org. Chem. 1992, 57, 1242-1252.
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47
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0036644261
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(c) Williams, D. R.; Mi, L.; Mullins, R. J.; Stites, R. E. Tetrahedron Lett. 2002, 43, 4841-4844.
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Williams, D.R.1
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Mullins, R.J.3
Stites, R.E.4
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48
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30144440717
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note
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3.
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49
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30144438859
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note
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When 10 equiv of LiCl was added to the reaction mixture (3.5 h at room temperature), 3a was obtained in 67% yield as the sole product.
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50
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30144440561
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note
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When N-acetyl-2-iodoaniline was exposed to conditions A or B, the corresponding allenyl derivative or indole derivative was selectively formed in the respective yields of 80% and 70%, although a higher reaction temperature (50°C) was necessary under conditions A.
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51
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30144436737
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note
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3 effected the ring-closing reaction to produce the N-acetyl congener of 3a in 49% yield.
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52
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30144438532
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note
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Compound 4a could be converted into 1-(terf-butoxycarbonyl)-3- hydroxymethyl-2-methylindole (desilylated-3a) in 66% yield by exposure to TBAF.
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53
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30144437546
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note
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The use of TBAF in place of TBAC in the palladium-catalyzed coupling reaction (conditions B) was unfortunately found to be fruitless.
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54
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0000618278
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(a) Shen, T. Y.; Ellis, R. L.; Windholz, T. B.; Matzuk, A. R.; Rosegay, A.; Lucas, S.; Witzel, B. E.; Stammer, C. H.; Wilson, A. N.; Holly, F. W.; Willett, J. D.; Sarett, L. H.; Holtz, W. J.; Risley, E. A.; Nuss, G. W.; Winter, C. A. J. Am. Chem. Soc. 1963, 85, 488-489.
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Shen, T.Y.1
Ellis, R.L.2
Windholz, T.B.3
Matzuk, A.R.4
Rosegay, A.5
Lucas, S.6
Witzel, B.E.7
Stammer, C.H.8
Wilson, A.N.9
Holly, F.W.10
Willett, J.D.11
Sarett, L.H.12
Holtz, W.J.13
Risley, E.A.14
Nuss, G.W.15
Winter, C.A.16
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56
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30144434436
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note
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Prepared by the condensation of 2-iodo-4-methoxyaniline with 4-chlorobenzoyl chloride in 81% yield under the conventional conditions.
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