Intermediates for preparing alkylamino mercaptoalkylamides
US5449805A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Mar 2, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C327/28
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Alkylamino-mercaptoalkylamides have the formula ##STR1## wherein A represents the divalent radical --(CH.sub.2)n--, wherein n is a whole number ranging from 2 to 5, or the divalent radical --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --, PA1 m is 0, 1 or 2, PA1 R.sub.1 represents hydrogen or linear or branched lower alkyl having 1-5 carbon atoms, PA1 R.sub.2 and R.sub.3, each independently, represent hydrogen or a linear or branched lower alkyl having 1-4 carbon atoms with the proviso that R.sub.2 and R.sub.3 are not hydrogen simultaneously and the salts of the compound of formula I as well as the corresponding disulfides with the exclusion of the disulfide in which A.dbd.--(CH.sub.2).sub.2 --, m=0, R.sub.1 and R.sub.2 .dbd.H and R.sub.3 .dbd.--C.sub.2 H.sub.5. The compound of formula I is used as a reducing agent in a cosmetic composition for the permanent deformation of hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.