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Highly enantioselective alkynylations have been described recently but required the use of a large excess of zinc derivative
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Highly enantioselective alkynylations have been described recently but required the use of a large excess of zinc derivative:
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63749123636
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In the absence of chiral ligand, low yield was obtained
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(e) Zhong, J.-C.; Hou, S.-C.; Bian, Q.H.; Yin, M.-M.; Na, R.-S.; Zheng, B.; Li, Z.-Y.; Liu, S.-Z.; Wang, M. Chem.-Eur. J. 2009, 3069-3071. In the absence of chiral ligand, low yield was obtained:
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Surprisingly, no reaction, occurred when zinc acetylide ester was added on imine
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(f) Cozzi, P. G.; Rudolph, J.; BoIm, C.; Norrby, P.-O.; Tomasini, C. J. Org. Chem. 2005, 70, 5733-5736. Surprisingly, no reaction, occurred when zinc acetylide ester was added on imine.
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Reviews on sulfanamides: (a) Davis, F. A. Int. J. Sulfur Chem. 1973, 8, 71-81.
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33
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33846012907
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Alkyl N-Boc-imines were prepared in-situ from corresponding sulfones by an excess of ortho-lithiated sulfoxide (2.1 equiv): Grach, G.; Sopkova-de Oliveira Santos, J.; Lohier, J.-F.; Mojovic, L.; Pié, N.; Turck, A.; Reboul, V.; Metzner, P. J. Org. Chem. 2006, 71, 9572-9579.
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Alkyl N-Boc-imines were prepared in-situ from corresponding sulfones by an excess of ortho-lithiated sulfoxide (2.1 equiv): Grach, G.; Sopkova-de Oliveira Santos, J.; Lohier, J.-F.; Mojovic, L.; Pié, N.; Turck, A.; Reboul, V.; Metzner, P. J. Org. Chem. 2006, 71, 9572-9579.
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34
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67649503091
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The chemical shift of vinylic proton are consistent for each diastereoisomer: 6.35-6.44 ppm. for major and 5.79-5.93 ppm. for minor.
-
The chemical shift of vinylic proton are consistent for each diastereoisomer: 6.35-6.44 ppm. for major and 5.79-5.93 ppm. for minor.
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35
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33947706661
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To the best of our knowledge, only corresponding lithium acetylide has been described: Jones, A. C.; Sanders, A. W.; Bevan, M. J.; Reich, H. J. J. Am. Chem. Soc. 2007, 129, 3492-3493.
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To the best of our knowledge, only corresponding lithium acetylide has been described: Jones, A. C.; Sanders, A. W.; Bevan, M. J.; Reich, H. J. J. Am. Chem. Soc. 2007, 129, 3492-3493.
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36
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67649464447
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The chemical shift of the vinylic proton are consistent with the diastereoisomer E as the major isomer: 6.23-6.33 ppm.
-
The chemical shift of the vinylic proton are consistent with the diastereoisomer E as the major isomer: 6.23-6.33 ppm.
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37
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33745698682
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Ribiere, P.; Declerck, V.; Martinez, J.; Lamaty, F. Chem. Rev. 2006, 106, 2249-2269.
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Ribiere, P.1
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38
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67649467574
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These compounds are analogous to benzothiazinone described as heart muscular cell apoptosis inhibitors and cell death inhibitor
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These compounds are analogous to benzothiazinone described as heart muscular cell apoptosis inhibitors and cell death inhibitor.
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40
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67649484574
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WO Patent 090782
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(b) Kimura, H.; Sato, Y.; Takizawa, M.; Horiguchi, T.; Notoya, K. WO Patent 090782, 2003.
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Kimura, H.1
Sato, Y.2
Takizawa, M.3
Horiguchi, T.4
Notoya, K.5
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