# US 8,785,625 B2 · Compound having heterocyclic ring

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- Number: US 8,785,625 B2
- Document ID: US8785625B2
- Status: Granted
- Kind: B2
- Application number: 13/372,848
- Filed: 2012-02-14
- Published: 2012-08-16
- Granted: 2014-07-22
- Earliest claimed: 2006-03-31
- Assignees: Research Foundation Itsuu Laboratory; Shionogi & Co., Ltd.
- Applicants: Hideyuki Suzuki; Shoji Hizatate; Iwao Utsunomiya; Koichi Shudo
- Inventors: Hideyuki Suzuki; Shoji Hizatate; Iwao Utsunomiya; Koichi Shudo
- Web page: https://patentgrep.com/patent/US8785625B2

## CPC

- C07D 273/06: Seven-membered rings
- A61P 31/04: Antibacterial agents
- C07D 255/02: not condensed with other rings
- C07D 413/10: linked by a carbon chain containing aromatic rings
- C07D 413/14: containing three or more hetero rings
- C07D 417/14: containing three or more hetero rings
- C07D 471/14: Ortho-condensed systems
- Y02P 20/55: Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The invention provides a novel oxazolidinone derivative represented by the formula (I): wherein Ring A, X1, Ring B and R1 are as described in the description, and an antibacterial agent containing the same.

## Claims

### Claim 1

A compound of the formula:
or a pharmaceutically acceptable salt thereof,
wherein
Y1 is O;
P1 is hydrogen, acyl group or an amino protecting group;
R11 is hydrogen, acyl group or an amino protecting group, provided that —CO(CH2)3—CO2H, -Ph and —CH2Ph (Ph: phenyl) are excluded.

### Claim 2

A compound of the formula:
or a pharmaceutically acceptable salt thereof,
wherein
P1 and P2 are independently hydrogen or a lower alkoxycarbonyl;
R11 is hydrogen, acyl group or a lower alkoxycarbonyl, provided that —CO(CH2)3—CO2H is excluded.

### Claim 3 (depends on 2)

The compound according to claim 2 wherein P1 and P2 are independently a lower alkoxycarbonyl and R11 is hydrogen.