Detailed table of contents (pdf)

XXVIII Table of Contents
17.2.2.1.1.2.4.1 Method 1: Reactions of Ethanedial Hydrazone Oximes with
Ortho Esters or Related One-Carbon Donors ................ 374
17.2.2.1.1.2.4.1.1 Variation 1: Condensation of Hydrazono(phenyl)acetaldehyde Oxime
with Aldehydes ........................................... 375
17.2.2.1.1.2.4.2 Method 2: Synthesis of [1,2,3]Triazolo[5,1-f][1,2,4]triazine ............. 376
17.2.2.1.1.2.4.3 Method 3: Cyclization of 4-Hydrazonopyrazol-3(4H)-amines
with Acyl Nitriles .......................................... 376
17.2.2.1.1.2.4.4 Method 4: Reactions of Iminophosphoranes with Isocyanates .......... 376
17.2.2.1.1.2.5 Fragments C—C—N—N—C and N ........................................... 377
17.2.2.1.1.2.5.1 Method 1: Cyclization of 2-Acylhydrazono Ketones with Ammonia
or Ammonium Acetate .................................... 377
17.2.2.1.1.2.5.1.1 Variation 1: Cyclization of (N,N-Dimethylamino)ethylenehydrazones and
Related Compounds with Ammonium Acetate .............. 378
17.2.2.1.1.2.5.2 Method 2: Cyclization of 1,2-Diketone Monohydrazones with
Hydroxylamine ............................................ 379
17.2.2.1.1.2.5.3 Method 3: Reactions of 3,5-Disubstituted 4-Nitrosopyrazoles
with Phosphorus Pentachloride ............................ 379
17.2.2.1.1.2.5.4 Method 4: Cyclization of Uracil Hydrazones with Potassium Nitrate ..... 379
17.2.2.1.1.2.5.4.1 Variation 1: Microwave Reactions of 2-Hydrazinoquinolines with
Nitrous Acid .............................................. 380
17.2.2.1.1.2.5.5 Method 5: Reaction of 1-Phenyl-3-(pyrrol-1-yl)pyrazol-4-amine
with Nitrous Acid ......................................... 380
17.2.2.1.1.3 By Formation of One N—C Bond ........................................... 381
17.2.2.1.1.3.1 Fragment C—C—N—N—C—N ............................................... 381
17.2.2.1.1.3.1.1 Method 1: Photolysis of 1,2-Bis(2-diazido-1-phenylethylidene)diazine .. 381
17.2.2.1.1.3.1.2 Method 2: Cyclization of N-(1-Phenylethylidene)guanidin-2-amines .... 381
17.2.2.1.1.3.1.3 Method 3: Cyclization of 1-Cyanoalkanone 1-Aminoalkylidenehydrazones
.................................................... 382
17.2.2.1.1.4 Fragment N—C—C—N—N—C ............................................... 382
17.2.2.1.1.4.1 Method 1: Cyclization of a-[1,2-Bis(ethoxycarbonyl)hydrazino]a-(ethoxycarbonyl)acetimidamide
......................... 382
17.2.2.1.1.4.1.1 Variation 1: Cyclization of 3-(Acylhydrazino)pyridin-2-amines ........... 382
17.2.2.1.2 Annulation by the Formation of a Second Heterocyclic Ring ................. 383
17.2.2.1.2.1 Method 1: From 1,2,4-Triazine-5,6-diamines .......................... 383
17.2.2.1.2.2 Method 2: From 3-Hydrazino-1,2,4-triazines .......................... 383
17.2.2.1.2.2.1 Variation 1: Synthesis of 1,2,4-Triazolo[3,4-c][1,2,4]triazine 7-Oxide ..... 384
17.2.2.1.2.3 Method 3: Synthesis of Pyrazino[2,3-e][1,2,4]triazines ................. 384
17.2.2.1.2.4 Method 4: Cyclization of 5-Acyl-1,2,4-triazines with Arylhydrazines ..... 385
17.2.2.1.2.5 Method 5: Cyclization of 3-Allylamino-1,2,4-triazine with Bromine ..... 385
17.2.2.1.3 Synthesis by Ring Transformation .......................................... 386
17.2.2.1.3.1 Method 1: Oxidation of Imidazole-1,2-diamines ....................... 386
17.2.2.1.3.2 Method 2: Acidic Rearrangement of
2-(Hydroxyimino)imidazol-5-imines ........................ 386