Hydrocarbyl carboxybetaine and method for preventing hofmann elimination in alkaline environment
A Hydrocarbyl Carboxybetaine represented by Formula (1) is provided: wherein, n 1 ≥0 and n 2 >0, A is a C1-C20 alkyl group when n 1 >0, and A is a single bond when n 1 =0. R 1 , R 2 , R 3 , and R 4 are each independently selected from hydrogen atom, deuterium atom, C1-C20 alkyl group, C2-C20 alkenyl group and C2-C20 alkynyl group; X is selected from SH, SOCH 3 , SCH 3 , NH 2 , SiCl 3 , Si(OCH 3 ) 3 , Si(OCH 2 CH 3 ) 3 ,
1. Hydrocarbyl carboxybetaine represented by Formula (1) below:
wherein, n 1 ≥0 and n 2 >0;
A is C1-C20 alkyl group when n 1 >0, and A is a single bond when n 1 =0;
R 1 , R 2 , R 3 , and R 4 are each independently selected from hydrogen atom, deuterium atom, C1-C20 alkyl group, C2-C20 alkenyl group and C2-C20 alkynyl group; and
X is selected from SH, SOCH 3 , SCH 3 , NH 2 , SiCl 3 , Si(OCH 3 ) 3 , Si(OCH 2 CH 3 ) 3 ,
2. The hydrocarbyl carboxybetaine of claim 1 , wherein Formula (1) is represented by Formula (2) or Formula (3) below:
wherein, n 1 , n 2 , A, R 1 , R 2 , R 3 , R 4 and X are defined in a same way as Formula (1).
3. The hydrocarbyl carboxybetaine of claim 2 , wherein n 1 =0, one of R 1 , R 2 , R 3 and R 4 is C1-C20 alkyl group, and the remainder are hydrogen atoms.
4. The hydrocarbyl carboxybetaine of claim 2 , wherein one of R 1 , R 2 , R 3 and R 4 is methyl group, and the remainder are hydrogen atoms.
5. The hydrocarbyl carboxybetaine of claim 2 , wherein X is
6. The hydrocarbyl carboxybetaine of claim 1 , wherein the hydrocarbyl carboxybetaine represented by Formula (1) is