Synthesis and complexation properties of photochromic benzochromenes containing aza-and diaza-18-crown-6-ether fragments
✍ Scribed by O. A. Fedorova; Yu. P. Strokach; A. V. Chebun’kova; T. M. Valova; S. P. Gromov; M. V. Alfimov; V. Lokshin; A. Samat
- Publisher
- Springer
- Year
- 2006
- Tongue
- English
- Weight
- 414 KB
- Volume
- 55
- Category
- Article
- ISSN
- 1573-9171
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Although in the 2H-chromene (benzopyran) series complexation with tricarbonylchromium, under thermal conditions, is totally regioselective, in the naphthopyran series the same reaction cannot be observed. We show here that with tricarbonyl(trispyridine)chromium as complexing agent, in the presence o
## Abstract A series of double armed diaza‐15‐crown‐5 ethers **(9a ‐ 16a)** and diaza‐18‐crown‐6 ethers **(9b ‐ 16b)** have been prepared by the Mannich reaction of 2,6‐disubstituted phenols with the corresponding __N,N__'‐dimethoxymethyldiaza‐crown ethers in benzene. The crystal structures of the