The sulfuric acid-promoted reaction of benzo-15-crown-5 O) and benzo-18-crown-6 (6) with aliphatic aldehydes, leading to the formation of anthracene crown et~rs, was studied. A substantial substiment effect on the reaction comse was found. For the isdmtyi group the highest yield was obtained, while
The internal motions of benzo-substituted crown ethers
โ Scribed by M Geringer; H Sterk
- Publisher
- Elsevier Science
- Year
- 1989
- Weight
- 524 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0022-2364
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The Synthesis of Anthracene Crown Ethers Derived from Benzo-Crown Ethers. -A method to obtain anthracene crown ethers starting from benzo-15-crown-5-ether and benzo-18-crown-6-ether and various aldehydes is described. The yield strictly depends on the aldehyde. Cyclohexanone leads to a new class of
A series of benzo-crown ethers containing the thiazole subcyclic moity have been synthesized. Reaction of 1,2-bis(thioamidomethyloxy)benzene 2 with ethyl bromopyruvate in ethanol provided 1,2-bis(thiazolyl)benzene \(4(80 \%)\) along with thiazole \(5(14 \%)\). Reduction of 4 with lithium aluminum hy
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