Silanes comprising oxamido ester groups

Patent metadata

Field	Value
Publication number	US-11459346-B2
Application number	US-201716955548-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Dec 19, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

Oxamidoester-functional alkylalkoxysilanes are prepared in high yield by the reaction of an alkylalkoxysilane with an oxalic diester.

First claim

The invention claimed is:

1. A method for preparing silanes having oxamidoester groups, of the formula

comprising: reacting aminosilanes (A) of the formula
R x —NH—Y—Si—R 1 t (R 2 O) 3-t   (II)

with oxalic diesters (B) of the formula

where
R 1 are identical or different and represent monovalent, optionally substituted, SiC-attached hydrocarbon radicals optionally interrupted by heteroatoms,
R 2 are identical or different and represent hydrogen or monovalent, optionally substituted hydrocarbon radicals optionally interrupted by heteroatoms,
R 3 represents a monovalent, optionally substituted hydrocarbon radical optionally interrupted by oxygen atoms,
R x represents hydrogen or an optionally substituted hydrocarbon radical,
Y represents a divalent, optionally substituted hydrocarbon radical optionally interrupted by oxygen atoms or nitrogen atoms, and
s is 1 or 2, and
t is 1 or 2.

2. The method of claim 1 , wherein the molar ratio of compound(s) of the formula (III) to aminosilanes of the formula (II) is greater than 1:1.

3. The method of claim 1 , wherein the reaction is carried out at 0° C. to 150° C.

4. The method of claim 1 , wherein the reaction is carried out at a pressure of 400 to 1100 hPa.

Assignees

• Wacker Chemie Ag

Inventors

• Schaefer Oliver

Classifications

• C07F7/1892 Primary

  by reactions not provided for in C07F7/1876 - C07F7/1888 · CPC title

• C07F7/1804 Primary

  Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896) · CPC title