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J. Saunders, M. Cassidy, S.B. Freedmen, E.A. Harley, L.L. Iversen, C. Kneen, A.M. MacLeod, K.J. Merchant, R.J. Snow, and R. Baker J. Med. Chem. 33 1990 1128
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77949969012
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For examples of 1,3,4-oxadiazole synthesis from silylated diacylhydrazines, see: B. Rigo, D. Fassuer, P. Cauliez, and D. Couturier Synth. Commun. 19 1989 2321
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For cyclizations using chloramine T, see: S.P. Singh, R. Naithani, H. Batra, O. Prakash, and D. Sharma Indian J. Heterocycl. Chem. 8 1998 103
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0033578789
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For a method using 2-chloro-1,3-dimethylimidazolinium chloride, see: T. Isobe, and T. Ishikawa J. Org. Chem. 64 1999 6989
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Isobe, T.1
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23744497662
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For the synthesis of haloalkyl-1,3,4-oxadiazoles from cyclopropyldiacylhydrazides see: Y.-H. Yang, and M. Shi Tetrahedron Lett. 46 2005 6285
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Shi, M.2
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S. Borg, R.C. Vollinga, M. Labarre, K. Payza, L. Terenius, and K. Luthman J. Med. Chem. 42 1999 4331
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29144462676
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Jpn. Kokai Tokkyo Koho, JP 2002060742 A2, 2002.
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A Chemical Abstracts search found only five compounds; Suda, Y.; Onikubo, S. Jpn. Kokai Tokkyo Koho, JP 2002060742 A2, 2002.
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29144462092
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Jpn. Kokai Tokkyo Koho, JP 10152676 A2, 1998
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Okutsu, S.; Onikubo, S.; Tamano, M.; Enokida, T.; Jpn. Kokai Tokkyo Koho, JP 10152676 A2, 1998
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29144485532
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29144479388
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Jpn. Kokai Tokkyo Koho, JP 10020495 A2, 1998
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Yumoto, M.; Yagihara, N.; Fujimori, J.; Jpn. Kokai Tokkyo Koho, JP 10020495 A2, 1998
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29144528186
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Chem. Abstr. 124 1995 117240
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43
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0030806491
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For one example using similar conditions, see: P. Brown, D.J. Best, N.J.P. Broom, R. Cassels, P.J. O'Hanlon, T.J. Mitchell, N.F. Osborne, and J.M. Wilson J. Med. Chem. 40 1997 2563
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Mitchell, T.J.6
Osborne, N.F.7
Wilson, J.M.8
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45
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29144478457
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note
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+. Monoacylhydrazide 3 was prepared by EDCI/HOBt coupling of the corresponding acid with an excess of hydrazine monohydrate.
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46
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note
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+.
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47
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29144534945
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note
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Polanc has demonstrated a similar one-pot protocol for a limited number of substrates starting from monoacylhydrazides and isocyanates to give 2-amino-1,3,4-oxadiazoles (see Ref. 14).
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48
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29144531346
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note
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+.
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