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The reaction was also effective with a smaller amount of MeOH, such as a 20:1 mixture of DMF and MeOH, but the yield of 2a decreased to 70% as determined by NMR spectroscopy.
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The reaction was also effective with a smaller amount of MeOH, such as a 20:1 mixture of DMF and MeOH, but the yield of 2a decreased to 70% as determined by NMR spectroscopy.
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CCDC-684836 (2a) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre at www.ccdc.cam.ac.uk/data_request/cif.
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CCDC-684836 (2a) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre at www.ccdc.cam.ac.uk/data_request/cif.
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33
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0032580464
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It was reported that trimethylsilyl azide is a convenient source of hydrazoic acid in methanol; see: a H. Bienayme, K. Bouzid, Tetrahedron Lett. 1998, 39, 2735-2738;
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It was reported that trimethylsilyl azide is a convenient source of hydrazoic acid in methanol; see: a) H. Bienayme, K. Bouzid, Tetrahedron Lett. 1998, 39, 2735-2738;
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3 and RCN, whatever the precise mechanism may be.
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3 and RCN, whatever the precise mechanism may be.
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2O in MeOH/DMF [Eq. (8)]. We appreciate this useful comment.
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2O in MeOH/DMF [Eq. (8)]. We appreciate this useful comment.
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