Abstract
The first examples of 3H-furo[3,4-c]pyrazoles and 3H-thieno[3,4-c]pyrazoles were prepared in an attempt to isolate examples of cyclopropane-fused thiophenes and furans. Adducts of acetylenic ketones and 2-diazopropane were reacted with 10-camphorsulfonic acid or phosphorus pentasulfide to produce the title compounds. Photolysis of these compounds did not give the cyclopropane-fused products rather an unreported photochemical fragmentation was observed. © 2013 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 9316-9321 |
| Journal | Tetrahedron |
| Volume | 69 |
| Issue number | 44 |
| DOIs | |
| Publication status | Published - 2013 |