Catalyst for poly(lactide) synthesis and uses thereof

Patent metadata

Field	Value
Publication number	US-9988488-B2
Application number	US-201414781016-A
Country	US
Kind code	B2
Filing date	Mar 3, 2014
Priority date	Mar 26, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A catalysts for poly(lactide) synthesis having the structure of Formula I:

wherein R 1 and R 2 is, independently, C 1 -C 6 alkoxy, and R 3 arylalkyl or substituted phenyl are disclosed. Method of synthesizing the catalysts and method of using the catalysts to prepare poly(lactides) and compositions comprising the catalyst are also disclosed.

First claim

We claim:

1. A compound, having a structure of Formula I:

wherein:
R 1 is C 1 -C 6 alkoxy;
R 2 is C 1 -C 6 alkoxy; and
R 3 is optionally substituted

wherein:
R 4 is selected from the group consisting of H and C 1 -C 6 alkoxy,
R 5 is selected from the group consisting of H and C 1 -C 6 alkoxy, and
R 6 is selected from the group consisting of H and C 1 -C 6 alkoxy.

2. The compound of claim 1 , wherein R 3 is

3. The compound of claim 1 , wherein R 3 is

4. The compound of claim 3 , wherein R 4 is —OCH(CH 3 ) 2 , R 6 is —OCH(CH 3 ) 2 , and R 5 is H.

5. The compound of claim 1 , wherein R 1 is —OCH(CH 3 ) 2 and R 2 is —OCH(CH 3 ) 2 .

6. A composition, comprising a compound having Formula I:

wherein:
R 1 is C 1 -C 6 alkoxy;
R 2 is C 1 -C 6 alkoxy; and
R 3 is optionally substituted

wherein:
R 4 is selected from the group consisting of H and C 1 -C 6 alkoxy,
R 5 is selected from the group consisting of H and C 1 -C 6 alkoxy, and
R 6 is selected from the group consisting of H and C 1 -C 6 alkoxy.

7. A compound, having a structure of Formula I:

wherein:
R 1 is C 1 -C 6 alkoxy;
R 2 is C 1 -C 6 alkoxy; and
R 3 is optionally substituted

8. A compound, having a structure of Formula I:

wherein:
R 1 is C 1 -C 6 alkoxy;
R 2 is C 1 -C 6 alkoxy; and
R 3 is optionally substituted

wherein:
R 4 is selected from the group consisting of H and C 1 -C 6 alkoxy;
R 5 is selected from the group consisting of H and C 1 -C 6 alkoxy; and
R 6 is selected from the group consisting of H and C 1 -C 6 alkoxy.

Assignees

• Indian Institute Of Tech Madras

Inventors

• Chakraborty Debashis
• Ghosh Swarup
• Ramkumar Venkatachalam

Classifications

• C08G63/89

  Recovery of the polymer · CPC title

• C08G63/90

  Purification; Drying · CPC title

• C08G63/823 Primary

  for the preparation of polylactones or polylactides · CPC title

• C07F5/069

  without C-aluminium linkages · CPC title

• C07F5/066 Primary

  compounds with Al linked to an element other than Al, C, H or halogen (this includes Al-cyanide linkage) · CPC title