𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Syntheses and Structural Properties of 1,8-Diazacyclotetradeca-3,5,10,12-tetraynes

✍ Scribed by Kirstin Hövermann; Joachim Ritter; Frank Rominger; Bernhard Nuber; Rolf Gleiter

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
264 KB
Volume
2000
Category
Article
ISSN
1434-193X

No coin nor oath required. For personal study only.

✦ Synopsis

The syntheses of 1,8-diazacyclotetradeca-3,5,10,12-tetrayne (2a), its N,NЈ-dimethyl (2b), N,NЈ-diethyl (2c), N,NЈ-diisopropyl (2d), N,NЈ-diallyl (2e), and N,NЈ-dibenzyl (2f) derivatives were achieved in a one-pot procedure from primary amines and 1,6-dibromo-2,4-hexadiyne (4). Diffraction studies on single crystals of 2c-2f reveal a chair conformation with the

📜 SIMILAR VOLUMES

Molecular Structures of Cyclotetradeca-1
Molecular Structures of Cyclotetradeca-1,3,8,10-tetrayne and Cyclohexadeca-1,3,9,11-tetrayne
✍ Rolf Gleiter; Roland Merger; Jorge Chavez; Thomas Oeser; Hermann Irngartinger; H 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 223 KB

Cyclotetradeca-1,3,8,10-tetrayne (3) and cyclohexadeca-both molecules deviate considerably from linearity, giving rise to transannular distances of the terminal sp centers of 1,3,9,11-tetrayne (4) have been prepared according to Sondheimer et al. The X-ray crystal structures of 3 and 4 3.098(2) A ˚(

Synthesis and Structural Properties of B
Synthesis and Structural Properties of Bridged 1,8-Diazacyclotetradeca-4,11-diynes
✍ Volker Wolfart; Rolf Gleiter; Hermann Irngartinger; Thomas Oeser; Claus Krieger 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 186 KB

The synthesis of 1,8-diazacyclotetradeca-4,11-diyne (4) was diisopropyl-1,8-diazacyclotetradeca-4,11-diyne (13a), as well as of 14, 24, 27 and 31 were studied by means of the X-ray accomplished by reaction of 1,6-dibromo-3-hexyne (11) with ammonia. Similarly, the preparation of 1-azacyclotetradeca-t

Synthesis and properties of polyimides f
Synthesis and properties of polyimides from thianthrene-2,3,7,8-tetracarboxylic dianhydride-5,5,10,10-tetraoxide
✍ Jianqiang Hao; Kazuhiro Tanaka; Hidetoshi Kita; Ken-Ichi Okamoto 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 247 KB 👁 1 views

## Thianthrene -2,3,7,8 -tetracarboxylic dianhydride -5,5,10,10 -tetraoxide (TADATO) , a dianhydride having two sulfonyls between two phenyl rings, was synthesized and polymerized with several diamines by a two-step method. Tough polyimide membranes were obtained with flexible diamines but not wit

Synthesis and Properties of 7,7,12,12-Te
Synthesis and Properties of 7,7,12,12-Tetramethyl-1,4-dioxacyclotetradecane-8,9,10,11-tetrone
✍ Christoph Braunweiler; Sabine Bethke; Frank Rominger; Rolf Gleiter 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 300 KB

The fourteen-membered ring of 7,7,12,12-tetramethyl-1,4-(R,S) isomer 18a revealed a transannular interaction between the dioxaethane bridge and the dicarbonyl moiety. dioxacyclotetradecane-8,9,10,11-tetrone (4) was built up from 1,2-bis(2Ј-chloroethoxy)ethane, two units derived from Calculations (HF