Lonza Guangzhou Pharmaceutical Ltd.

China

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2022 1
2021 1
IPC Class
C07D 265/20 - 1,3-OxazinesHydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems condensed with one six-membered ring with hetero atoms directly attached in position 4 1
C07D 265/26 - Two oxygen atoms, e.g. isatoic anhydride 1
C07D 307/20 - Oxygen atoms 1
Found results for  patents

1.

Method for preparation of Carsalam

      
Application Number 17603107
Grant Number 12304892
Status In Force
Filing Date 2020-05-18
First Publication Date 2022-06-23
Grant Date 2025-05-20
Owner LONZA GUANGZHOU PHARMACEUTICAL LTD. (China)
Inventor
  • Lin, Xingbang
  • Zhou, Ji

Abstract

The invention discloses a method for preparation of Carsalam by a reaction of salicylamide with diethyl carbonate in the presence of an alkali ethoxide.

IPC Classes  ?

  • C07D 265/26 - Two oxygen atoms, e.g. isatoic anhydride
  • C07D 265/20 - 1,3-OxazinesHydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems condensed with one six-membered ring with hetero atoms directly attached in position 4

2.

Method for preparation of 1,4-sorbitan

      
Application Number 17265939
Grant Number 11174236
Status In Force
Filing Date 2019-08-26
First Publication Date 2021-08-26
Grant Date 2021-11-16
Owner
  • Lonza Guangzhou Pharmaceutical Ltd. (China)
  • Lonza Ltd (Switzerland)
Inventor
  • Wei, Jieping
  • Yang, Yanling
  • Shan, Daniel
  • Zhu, Reta
  • Hanselmann, Paul
  • Scherer, Dieter

Abstract

The invention discloses a method for preparation of 1,4-sorbitan by dehydration of D-sorbitol, wherein one equivalent of water is removed and a cyclization occurs, followed by a treatment with ethanol and isopropanol.

IPC Classes  ?