# US 6,297,382 B1 · Compound and process for producing β-adrenergic receptor agonist

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- Number: US 6,297,382 B1
- Document ID: US6297382B1
- Status: Granted
- Kind: B1
- Application number: 09/620,042
- Filed: 2000-07-20
- Granted: 2001-10-02
- Earliest claimed: 1999-07-23
- Assignees: Pfizer Inc.
- Inventors: Robert W. Scott
- Web page: https://patentgrep.com/patent/US6297382B1

## CPC

- C07D 213/73: Unsubstituted amino or imino radicals
- C07D 401/04: directly linked by a ring-member-to-ring-member bond
- C07D 405/14: containing three or more hetero rings
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)

## Abstract

A process is provided for preparing a compound of the formula: comprising deprotecting a compound of the formula

## Claims

### Claim 1

A compound having the formula
wherein R2 and R3 are independently C1-C3 alkyl or phenyl.

### Claim 2

A compound having the formula
wherein R1 is C1-C8 alkyl, and R2 and R3 are independently C1-C3 alkyl or phenyl.