✦ LIBER ✦

Synthesis of highly symmetric mesomeric triazaphenalene betaines

✍ Scribed by Stanislav Kafka; Barbara Larissegger-Schnell; Thomas Kappe

Publisher: Journal of Heterocyclic Chemistry
Year: 2004
Tongue: English
Weight: 150 KB
Volume: 41
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570410511

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The synthesis of seven mesomeric triazaphenalene betaines 4a‐g by condensation reaction of hexahydro‐2__H__‐pyrimido[1,2‐a]pyrimidine 1 with diethyl malonates 2a‐g or with bis(2,4,6‐trichlorophenyl)malonates 3c,f has been achieved. The guanidine 1 forms in benzene solution a salt with trimethyl methanetricarboxylate 5 which upon heating produces 4a.

📜 SIMILAR VOLUMES

Cross-Conjugated and Pseudo-Cross-Conjug

Cross-Conjugated and Pseudo-Cross-Conjugated Mesomeric Betaines. Part 21. Synthesis of Highly Symmetric Mesomeric Triazaphenalene Betaines.

✍ Stanislav Kafka; Barbara Larissegger-Schnell; Thomas Kappe 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 17 KB

ChemInform Abstract: Synthesis of Cross-

ChemInform Abstract: Synthesis of Cross-Conjugated Heterocyclic Mesomeric Betaines.

✍ K. Saidi; H. Sheibani 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 26 KB 👁 1 views

ChemInform Abstract: Synthesis of New Co

ChemInform Abstract: Synthesis of New Conjugated Mesomeric Betaines from Alkoxycarbonylazinium Salts.

✍ J. VALENCIANO; A. M. CUADRO; J. J. VAQUERO; J. L. GARCIA-NAVIO; J. ALVAREZ-BUILL 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB

Synthesis of New Conjugated Mesomeric Betaines from Alkoxycarbonylazinium Salts. -Treatment of the iodide (I), which is generated from 2-ethoxycarbonylpyridinium N-aminide, with aminoheterocycles leads to various mesomeric betaines like (III) and (VI). In some cases, however, desired betaines are n

ChemInform Abstract: Synthesis of Mesome

ChemInform Abstract: Synthesis of Mesomeric Betaines, Quinoliziniumides, via Back-Donated 1,6-Cyclization.

✍ Y. MATSUDA; K. KATOU; T. NISHIYORI; T. UEMURA; M. URAKAMI 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 35 KB

Synthesis of Mesomeric Betaines, Quinoliziniumides, via Back-Donated 1,6-Cyclization. -3-Aminopyridinium salts (I) react with polarized olefins to form the corresponding 3-aminopyridinium N-allylides (III). Thermolysis in xylene or acetic acid affords the back-donated 1,6-cyclization products (IV)

ChemInform Abstract: Synthesis and Base-

ChemInform Abstract: Synthesis and Base-Pairing of Self-Complementary Mesomeric Betaines of Guanine (VI).

✍ Andreas Schmidt; Nikoloz Kobakhidze 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 27 KB

ChemInform Abstract: Synthesis of Mesome

ChemInform Abstract: Synthesis of Mesomeric Betaines, [1,2,4]Triazolo[2,3-a]pyridiniumides, via Back-Donated 1,6-Cyclization.

✍ Yoshiro Matsuda; Keisuke Katou; Chieko Motokawa; Takashi Uemura 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB

## 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