𝔖 Bobbio Scriptorium
✦   LIBER   ✦

An improved synthesis of a polymer-supported distannane and its application to radical formation

✍ Scribed by Jörg Junggebauer; Wilhelm P Neumann


Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
578 KB
Volume
53
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.

✦ Synopsis


A polymer-supported distannane 1 was prepared by treatment of tin halide resin with lithium naphthalenide or sodium naphthalenide in THF. The content of the polymers 1 was determined to be 0.95 to 1.13 mmol/g tin as ditin. The polymer-supported distannane reagent was successfully applied to radical cyclizations of acyclic ct-haloesters to yield 7-butyrolactones.


📜 SIMILAR VOLUMES


Unprecedented polymer-supported π-acid:
✍ Yukio Masaki; Nobuyuki Tanaka; Tsuyoshi Miura 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 230 KB

A novel polymer was synthesized by copolymerization of styrene monomer bearing dicyanoketene acetal functionality and ethylene glycol dimethacrylate, and used successfully as a recyclable ~-acid catalyst in monothioacetalization of aromatic, aliphatic, acyclic, and cyclic acetals with thiophenol and

Free radical addition of haloalkanes to
✍ H.M.S Kumar; P.Pawan Chakravarthy; M Shesha Rao; P.Sunder Ram Reddy; J.S Yadav 📂 Article 📅 2002 🏛 Elsevier Science 🌐 French ⚖ 306 KB

Polymer bound olefins undergo free radical initiated 1,2-addition when reacted with a variety of haloalkanes. The strategy could be applied successfully to the solid-phase synthesis of dihaloethenylcyclopropane carboxylic acids which are the key fragments of synthetic pyrethroids.

An improved preparation of 4-ethynylpyri
✍ Neil R. Champness; Andrei N. Khlobystov; Alexander G. Majuga; Martin Schröder; N 📂 Article 📅 1999 🏛 Elsevier Science 🌐 French ⚖ 212 KB

A convenient synthesis of 4-ethynylpyridine, 5, starting from 4-vinylpyridine has been developed. Compound 5 reacts readily with pyridyl-and aryl-iodides to give the linear bidentate ligands 7, 9, and 11 in excellent yields.

Synthesis of a new polymer-supported 1,3
✍ Qi-Sheng Ren; Wen-Qiang Huang; Ping-Lum Ho 📂 Article 📅 1989 🏛 Elsevier Science ⚖ 548 KB

A new 1,3-diol-containing polymer, 1-polystyryl-2,2-dimethyl-l,3-propanediol (V1), has been prepared by aldol condensation and disproportionation of an isobutyrylated divinylbenzene (2 %)-styrene copolymer with paraformaldehyde in the presence of potassium hydroxide under anhydrous conditions. Polym