6-substituted thia-aza compounds
US4952690A · kind A · utility
8Cited by
17References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/568
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to azetidin-2-ones of the formula ##STR1## wherein R.sub.a represents hydroxy-lower alkyl, R.sub.1 represents hydrogen, an organic radical bonded by a carbon atom to the ring carbon atom or an etherified mercapto group, R.sub.2.sup.A together with the carbonyl group to which it is attached is a protected carboxyl group and Z' is oxygen, sulfhur or an optionally substituted methylidene group, functional groups in the radicals R.sub.a, R.sub.1 and Z' optionally being in protected form. The azetidinones are useful intermediates for the preparation of penem antibiotics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.