The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2021
Filed:
Jun. 27, 2019
Applicant:
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Inventors:
Yuki Suka, Joetsu, JP;
Yuji Harada, Joetsu, JP;
Takeru Watanabe, Joetsu, JP;
Shiori Nonaka, Joetsu, JP;
Assignee:
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 7/08 (2006.01); C07F 7/10 (2006.01); C08G 65/12 (2006.01); C08G 65/26 (2006.01); C08G 65/333 (2006.01);
U.S. Cl.
CPC ...
C07F 7/0892 (2013.01); C07F 7/10 (2013.01); C08G 65/12 (2013.01); C08G 65/2609 (2013.01); C08G 65/33303 (2013.01); C08G 65/33306 (2013.01); Y02P 20/55 (2015.11);
Abstract
A method simply produces a narrowly distributed and high-purity polyalkylene glycol derivative having an amino group at an end without using a heavy metal catalyst. A method for producing a polyalkylene glycol derivative having an amino group at the end by reacting a compound represented by the general formula (V) with an alkylene oxide, then reacting a reaction product with an electrophile represented by the general formula (I), and deprotecting the obtained product without using a heavy metal:RO(RO)ROM  (V)