## Abstract This study represents a facile synthesis of building blocks (**1–3**) of crown ethers and amine precoursers (**4a‐d**). The study also involves synthesis of mono and dibenzo __N, N__‐disubstituted diaza 18‐crown‐6 derivatives with high yield without chromatographic purification and high
Synthesis of Mono Protected 1,10-Diaza-18-crown-6.
✍ Scribed by Christian P. Mandl; Burkhard Koenig
- Publisher
- John Wiley and Sons
- Year
- 2005
- Weight
- 18 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0931-7597
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✦ Synopsis
Abstract
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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
## 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
multi-membered O,N,S-heterocycles multi-membered O,N,S-heterocycles (with at least 2 different heteroatoms