# US 7,411,053 B2 · Ligand-functionalized/azo compounds and methods of use thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,411,053 B2
- Document ID: US7411053B2
- Status: Granted
- Kind: B2
- Application number: 11/420,307
- Filed: 2006-05-25
- Published: 2007-11-29
- Granted: 2008-08-12
- Earliest claimed: 2006-05-25
- Inventors: Issifu I. Harruna; Guangchang Zhou
- Web page: https://patentgrep.com/patent/US7411053B2

## CPC

- C08F 2/38: Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation}
- C07D 213/24: with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D 213/30: Oxygen atoms
- C07D 213/32: Sulfur atoms
- C07D 213/89: with hetero atoms directly attached to the ring nitrogen atom
- C07D 519/00: Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
- C08F 4/04: Azo-compounds
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)

## Abstract

Described herein are ligand-functionalized/azo compounds and methods of use thereof.

## Claims

### Claim 1

A compound of the formula II
wherein L1 and L2 are, independently, a substituted or unsubstituted bipyridine group, tripyridine group, or phenanthroline group;
R1 and R3 are a C1-C4 alkyl group;
R2 and R4 are a cyano group;
X and Y are, independently, O or NH; and
m and n are 2 or 3.

### Claim 2 (depends on 1)

The compound of claim 1, wherein L1 and L2 are, independently

### Claim 3 (depends on 1)

The compound of claim 1, wherein the compound has the formula III
wherein L1 and L2 are

### Claim 4 (depends on 1)

The compound of claim 1, wherein the compound has the formula IV
wherein L1 and L2 are

### Claim 5 (depends on 1)

A method for producing a polymer, comprising heating a mixture of one or more ethylenically unsaturated monomers, a chain transfer agent, and the compound of claim 1.