Novel Dispiro Iminodioxolane Derivatives: Synthesis by Reaction of Isocyanides with Ninhydrin.
β Scribed by Ahmad Shaabani; Mohammad Bagher Teimouri; Hamid Reza Bijanzadeh
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 68 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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## Abstract The reaction of the ninhydrin (1) with 1,2βbishydroxylamines 2aβc affords dihydroindeno[1,2β__b__]pyrazine __N__,__N__β²βdioxides 5aβc. The intermediates hexahydroβ and tetrahydroindeno[1,2β__b__]pyrazines 3a and 4c, which have been isolated, are easily transformed into 5a, c. Heating of