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27
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33750717920
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note
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(a) The yield of entries 3 and 6 in Table 2 using condition B was 30 and 31%, respectively.
-
-
-
-
28
-
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33750716956
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-
note
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(b) Absence of nitrile during activation of the amide substrate in entry 18 of Table 2 afforded the product in 62% yield.
-
-
-
-
29
-
-
33750739867
-
-
note
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(c) The yield of entries 9, 17, 20, and 21 in Table 2 using 1.1 equiv of nitrile was 56, 70, 56, and 37%, respectively.
-
-
-
-
30
-
-
33750736773
-
-
note
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See Supporting Information for details.
-
-
-
-
31
-
-
33750706677
-
-
note
-
The use of the N-4-methoxyphenyl variant of the amide in entry 21 of Table 2 provided the corresponding quinazoline in 58% yield but with complete racemization. Please see Supporting Information for details.
-
-
-
-
33
-
-
33750698338
-
-
note
-
2O and 2-ClPyr under the reaction conditions was confirmed independently.
-
-
-
-
35
-
-
33750699716
-
-
note
-
The conversion of 6 to 3 may be facilitated by net addition of 2-chloropyridinium triflate to the nitrilium ion.
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