107300-02-7Relevant articles and documents
Reactions of Azines. 9. Preparation of 4,5-Dihydropyrazolopyridines, 6,7-Dihydropyrazolopyridines, and Pyrazolopyridines
Schweizer, Edward E.,Haynes, John E.,Hirwe, S. N.,Rheingold, Arnold A.
, p. 1319 - 1324 (2007/10/02)
The reactions of (3,4-diaza-2,4,6-heptatrienylidene)triphenylphosphoranes 12 with ketenes 15 provide a general route to 4,5-dihydropyrazolopyridines 18 via the thermal rearrangements of the allenylazine 16 intermediates.When one of the substituents