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1). A number of condensed triazole ring systems are readily converted to striazoles. 4-90, respectively). g.. 4. 4-91, R = C02H CH20H NHN=CHPh / References 1. 55: I444Of 5 . 58: 244% 9. 6 8 P39hlXq 13. 79: 9211)7x 17. 74: 13103p 21. 58: 5hhlc 25. 6 2 h302a 29. 7 0 1 I4407p 3 . 57: lh508e 7. W. 50312r 11, 85: P123928w IS. 60:5512g 19. 17~ 23. 5 4 9898c 27. 7 4 1 2 5 5 7 2 ~ 31. 7 6 l49YHn 4. 8 0 8284On X. 49: 13227a 12. 7 6 126882b 16. 64: 1945Xc 10. 64: 20HIc 24. 8 0 0hOX2d 28. 7 5 140792h 3 2 .

4-45). 4-6). 448) are readily prepared. 4-49) substituents. Bistriazoles connected by an aliphatic or aryl bridge are also prepared by this method (see Section 21. "~". 4. '" Thermal cyclization of this type of 1 acylaniidrazones has been reported to occur at 172 to 1 9 7 O . g.. g.. " This transformation was believed to involve cleavage of the azine to a benzonitrile, which underwent addition to another azine molecule to give the triazole product. 4. 4-4 (75%) A number of ring systems have been converted to 3,5-disubstituted s-triazoles in addition to those discussed previously.

77: 164587n 2. 4 9 11630g 6. 84: 9 0 0 8 1 ~ 10. 81: 25613n 14. 80: 59312r 3. 7. 11. 15. 1. 8. 12. 16. 2. 2-4)”4 5-phenyltriazoles in good yields. The orientation of the substitutents in these. 2-2). 5-disubstituted triazoles. 2-6 (see Section 1 . ” In addition, other preformed triazoles have been used as intermediates. 1. ” References 1. 4 9 11630g 5 . 57: 3982a 9. 83: 28165 2. 46: lll47a 6. 51: 12079a 3. 47: 4335a I . 67:43155e 4. 69 35596a 8. 3. 3,4-A&yl- or Aryl-Disubstituted 4H-1,2,4-Triazoles Several methods have been developed for the preparation of 3,4disubstituted triazoles by intermolecular cyclization of two reactants.

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