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. Author manuscript; available in PMC: 2008 Sep 3.
Published in final edited form as: Tetrahedron. 2007 Sep 3;63(36):9007–9015. doi: 10.1016/j.tet.2007.05.079

Table 2.

Intramolecular reactions of azides with aldehydes.

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entry compd n R1 R2 acid Product (yield, %)
4 5
1 3g 0 H C6H13 TFA - -
2 3g 0 H C6H13 TiCl4 - -
3 3a 1 allyl H TFA - 63
4 3a 1 allyl H TiCl4 - 90
5 3b 1 benzyl H TFA - 77
6 3b 1 benzyl H TiCl4 - 94
7 3c 2 allyl H TFA 60 -
8 3c 2 allyl H TiCl4 96 -
9 3d 2 benzyl H TFA 68 -
10 3d 2 benzyl H TiCl4 85 -
11 3e 3 allyl H TFA 53 -
12 3e 3 allyl H TiCl4 41 -
13 3f 3 benzyl H TFA 71 -
14 3f 3 benzyl H TiCl4 49 -