Branched amides of L-aspartyl-D-amino acid dipeptides
US4894464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07K5/06113
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Amides of L-aspartyl-D-amino acid dipeptides of the formula ##STR1## and physiologically acceptable cationic and acid addition salts thereof wherein R.sup.a is methyl, ethyl, n-propyl or isopropyl; R is a branched member selected from the group consisting of fenchyl, diisopropylcarbinyl, d-methyl-t-butylcarbinyl, d-ethyl-t-butylcarbinyl, di-t-butylcarbinyl, 2-methylthio-2,4-dimethylpentan-3-yl, ##STR2## where at least one of R.sup.3, R.sup.4, R.sup.5, R.sup.6 is alkyl having from one to four carbon atoms and the remainder are hydrogen or alkyl having from one to four carbon atoms, X is O, S, SO, SO.sub.2 C.dbd.O or CHOH; m is zero or 1-4, n and p are each zero, 1, 2 or 3 where the sum of n+p is not greater than 3 and the sum of the carbon atoms in R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is not greater than six, and when both of R.sup.3 and R.sup.4 or R.sup.5 and R.sup.6 are alkyl they are methyl or ethyl, ##STR3## where one of R.sup.7, R.sup.8, R.sup.9 is alkyl having from one to four carbon atoms and the remainder are hydrogen or alkyl having from one to four carbon atoms and the sum of the carbon atoms in R.sup.7, R.sup.8 and R.sup.9 is not greater than six, m and q are the same or…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.