✦ LIBER ✦

The synthesis of anthracene crown ethers derived from benzo-crown ethers

✍ Scribed by Ryszard Ostaszewski

Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 431 KB
Volume: 54
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(98)00370-6

No coin nor oath required. For personal study only.

✦ Synopsis

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 for longer and shorter alkyl groups the yield dropped down. Reaction of aco.aldehyde and benzo-15crown-5 leads to formation of compound 4 in 35% yield. Application of cyclohexanone as a ca~nyl reagent caused formation of till now unknown 4,5-disubstituted crown ether 8.

📜 SIMILAR VOLUMES

ChemInform Abstract: The Synthesis of An

ChemInform Abstract: The Synthesis of Anthracene Crown Ethers Derived from Benzo-Crown Ethers.

✍ R. OSTASZEWSKI 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB 👁 2 views

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

Synthesis of thiazole-containing benzo-c

Synthesis of thiazole-containing benzo-crown ethers

✍ Hong-Seok Kim; Young Kook Koh; Jun-Hyeak Choi 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 438 KB

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

From crown ethers to zeolites: Reaction

From crown ethers to zeolites: Reaction of EtAlCl2with crown ethers

✍ Jerry L. Atwood; Hosny Elgamal; Gregory H. Robinson; Simon G. Bott; James A. Wee 📂 Article 📅 1984 🏛 Springer Netherlands 🌐 English ⚖ 395 KB

Synthesis of Novel Aminophosphonic Deriv

Synthesis of Novel Aminophosphonic Derivatives of Benzo-15-crown-5 Ether.

✍ Bogdan Boduszek; Elzbieta Luboch 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 18 KB 👁 1 views

ChemInform Abstract: Synthesis of Thiazo

ChemInform Abstract: Synthesis of Thiazole-Containing Benzo-Crown Ethers.

✍ H.-S. KIM; Y. K. KOH; J.-H. CHOI 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 28 KB 👁 1 views

Macroheterocycles. 27. Amidomethylation

Macroheterocycles. 27. Amidomethylation of benzo-crown ethers

✍ N. G. Luk'yanenko; V. N. Pastushok; L. E. Tonya; R. G. Kostyanovskii 📂 Article 📅 1987 🏛 Springer US 🌐 English ⚖ 212 KB

The synthesis of some novel benzo-crown ethers by =-amidomethylation is described. ~-Amidomethylation at carbon (the Chernyak-Einhorn reaction) has been the subject of numerous articles and reviews [2, 3], but there have been no reports of the use of benzocrown ethers in such reactions, and only a