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84857056491
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2 catalyst for Lipid IV synthesis in Ref. 3a, but its reproducibility turned out to be poor
-
2 catalyst for Lipid IV synthesis in Ref. 3a, but its reproducibility turned out to be poor.
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-
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38
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80051784549
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Removal of MeOH and DMF from 7 and counter cation exchange of 8a, b with a trialkylamine are omitted in our method.
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Removal of MeOH and DMF from 7 and counter cation exchange of 8a, b with a trialkylamine are omitted in our method.
-
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39
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0033550301
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43
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0035840941
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Wong's group reported that HBTU worked well for a condensation between protecting group-free UDP-MurNAc and protected pentapeptide:, However, in our case, HBTU and HATU afforded six-membered lactone and lactam at 4-OH and 2-NHAc along with the desired products, respectively
-
Wong's group reported that HBTU worked well for a condensation between protecting group-free UDP-MurNAc and protected pentapeptide: H. Liu, R. Sadamoto, P.S. Sears, and C.-H. Wong J. Am. Chem. Soc. 123 2001 9616 However, in our case, HBTU and HATU afforded six-membered lactone and lactam at 4-OH and 2-NHAc along with the desired products, respectively
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46
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0003189615
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This reaction proceeded faster in pyridine than DMF as reported in the following paper
-
This reaction proceeded faster in pyridine than DMF as reported in the following paper: J.G. Moffatt, and H.G. Khorana J. Am. Chem. Soc. 80 1958 3756
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Khorana, H.G.2
-
47
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84857036539
-
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In contrast to tetrazole catalyst, NMI·HCl promoted the reaction in pyridine as well as DMF.
-
In contrast to tetrazole catalyst, NMI·HCl promoted the reaction in pyridine as well as DMF.
-
-
-
-
48
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84857042671
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7-DMF was observed in 30 min after addition of NMI·HCl (integral ratio of 7 to the new signal = ca. 5 to 1).
-
7-DMF was observed in 30 min after addition of NMI·HCl (integral ratio of 7 to the new signal = ca. 5 to 1).
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