Polyethylene glycol substituted acyl borates
US9944750B2 · kind B2 · utility
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Key dates
| Filing date | Jan 9, 2015 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jan 9, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Polyethylene glycol substituted acyl borates, methods for their preparation, and the use of the polyethylene glycol substituted acyl borates for the preparation of polyethylene glycol substituted macromolecules. The polyethylene glycol substituted acyl borate has the general formula (I)wherein PEG denotes a polyethylene glycol-based substituent; a is an integer from 1 to 12; X1, X2, and X3 are independently of one another selected from the group made of F, OR, N+R3, N+R2OR, N+R2SR, and N+R2NR2, and are optionally forming a cyclic or a bicyclic structure; and R is an organic substituent or H.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.