✦ LIBER ✦

Studies on phosphonium ylides XXI. Reactions of Wittig reagents with substituted 2-amino-1,4-naphthoquinones

✍ Scribed by Leila Sadek Boulos; Mona Hizkial Nasr Arsanious

Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 412 KB
Volume: 53
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(97)00088-4

No coin nor oath required. For personal study only.

✦ Synopsis

The reaction of methoxycarbonylmethylene 2b-and ethoxycarbonylmethylene 2e-triphenylphosphoranes with substituted 2-amino-l,4naphthoquinones la-c afforded the new p>rroline-ylidphosphoranes 3b-3g via 1,2-and 1,4-addition reactions. On the other hand, 2-dimethylamino-l,4-naphthoquinone ld reacts with cyanomethylenetriphenylphosphorane 2d to give adduct 4. Mechanisms accounting for the formation of the new prevJucts are discussed.

📜 SIMILAR VOLUMES

ChemInform Abstract: Studies on Phosphon

ChemInform Abstract: Studies on Phosphonium Ylides. Part 21. Reactions of Wittig Reagents with Substituted 2-Amino-1,4-naphthoquinones.

✍ L. S. BOULOS; M. H. N. ARSANIOUS 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 28 KB 👁 2 views

## 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

Studies on phosphonium ylide. XVIII. The

Studies on phosphonium ylide. XVIII. The reaction of Wittig reagents with phthalimidobenzoic acid azides

✍ Leila Sadek Boulos; Nahed Khir Eldin 📂 Article 📅 1993 🏛 Elsevier Science 🌐 French ⚖ 433 KB

Studies on phosphonium ylides XX. The be

Studies on phosphonium ylides XX. The behavior of Wittig reagents toward 1,4-benzoquinone monoimines

✍ Leila Sadek Boulos; Ibtisam Tadros Hennawy; Mona Hizkial Nasr Arsanious 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 634 KB

## Abstract Wittig reagents (__1a–c__) react with N‐(phenylsulfonyl)‐1,4‐benzoquinone monoimine __2a__ to give adducts __3a__, __4a__, and __4b__. On the other hand, the reactions of __2b__ with the same ylides (__1a–c__) yield the new products __3b__, __6a__, and __6b__, respectively. Mechanisms a

Action of Lawesson's reagent on substitu

Action of Lawesson's reagent on substituted 2-amino-1,4-naphthoquinones: Novel synthesis of benzodiphenoquinone-bis-1,3,2-thiazaphospholine-2-sulfide derivatives

✍ Leila S. Boulos; Hoda A. Abd-El-Malek 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 167 KB 👁 2 views

## 1, 3, 2, fide 1 reacts with substituted 2-amino-1,4-naphthoquinons 2a-d to give 4,5,4Ј,5Ј-benzodiphenoquinonebis-1,3,2-thiazaphospholine-2-sulfide derivatives of type 3. Compatible analytical and spectroscopic results were obtained for all the new compounds. A mechanism is proposed to explain t

ChemInform Abstract: Action of Lawesson′

ChemInform Abstract: Action of Lawesson′s Reagent on Substituted 2-Amino-1,4-naphthoquinones: Novel Synthesis of Benzodiphenoquinone-bis-1,3,2-thiazaphospholine-2-sulfide Derivatives (III).

✍ Leila S. Boulos; Hoda A. Abd-El-Malek 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 28 KB 👁 2 views

Study of Insertion Reactions with Phosph

Study of Insertion Reactions with Phosphorus Ylides − On Reactions between 4-(4-Methylphenyl)-2,3-benzoxazin-1-one and Alkylidene Phosphoranes

✍ Wafaa Mahmoud Abdou; Amin Farouk Mohammed Fahmy; Azza Abdel-Azeem Kamel 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB 👁 2 views

4-(4-Methylphenyl)-2,3-benzoxazin-1-one (1) reacts thermally with a series of alkylidene phosphoranes and the relevant salts to give mainly substituted isoquinolines. Thus, compound 1 reacts with ester ylides 2a and 2b to give isoquinolones 7a and 7b, whereas with benzoylmethylenetriphenylphosphoran