Claims
- 1. A compound of the formula: ##STR310## wherein R.sup.0 is a hydrogen atom or a protective group for hydroxyl, R.sup.1 is a lower alkyl group, R.sup.2 is a protective group for carboxyl or a negative charge, R.sup.3 is a hydrogen atom or a protective group for amino, R.sup.4 is a lower alkyl group or a substituted lower alkyl group, k is an integer of 0 to 4, and Q.sup..sym. is a quaternary nitrogen atom-containing group represented by either one of the formulas (1) to (4): ##STR311## wherein R.sup.5 is a hydrogen atom, a lower alkyl group or a 2-hydroxyethyl group, R.sup.6 is a hydrogen atom or a lower alkyl group and n is an integer of 0 to 4; ##STR312## wherein R.sup.7 and R.sup.8 are each a lower alkyl group or may be combined together to form a lower alkylene group, or R.sup.8 represents a substituted lower alkyl group and n is as defined above; ##STR313## wherein R.sup.9 is a lower alkyl group or a substituted lower alkyl group; or ##STR314## wherein R.sup.5, R.sup.6, R.sup.9 and n are each as defined above, and when R.sup.2 is said protective group, said compound contains an acid residue or its salt.
- 2. The compound according to claim 1, wherein R.sup.0 and R.sup.3 are each a hydrogen atom, R.sup.2 is a negative charge or its salt.
- 3. The compound according to claim 2, wherein Q.sup..sym. is a quaternary nitrogen atom-containing group represented by either one of the formulas (1 ) or (3).
- 4. The compound according to claim 3, wherein Q.sup..sym. is a quaternary nitrogen atom-containing group represented by the formula (1) wherein R.sup.5 is a hydrogen atom or a methyl group, R.sup.6 is a hydrogen atom and n is an integer of 0 to 4.
- 5. The compound according to claim 3, wherein Q.sup..sym. is a quaternary nitrogen atom-containing group represented by the formula (3) wherein R.sup.9 is a methyl group.
- 6. The compound according to claim 1, wherein R.sup.4 is a C.sub.1 -C.sub.5 alkyl group, a C.sub.2 -C.sub.5 alkanoyl(C.sub.1 -C.sub.5)alkyl group, a carbamoyl(C.sub.1 -C.sub.5)alkyl group, a C.sub.1 -C.sub.5 alkylaminocarbonyl-(C.sub.1 -C.sub.5) alkyl group, a di(C.sub.1 -C.sub.5)alkylaminocarbonyl(C.sub.1 -C.sub.5)-alkyl group or a hydroxy(C.sub.2 -C.sub.5)alkyl group.
- 7. The compound according to claim 1, wherein R.sup.1 is a methyl group.
- 8. The compound according to claim 1, wherein k is zero.
- 9. The compound according to claim 1, which has a (5S)-configuration.
- 10. The compound according to claim 1, which has a (4R,5S,6S,8R)-configuration.
- 11. A pharmaceutical composition which comprises as an active ingredient a pharmaceutically effective amount of at least one of the compounds as claimed in any of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, and at least one pharmaceutically acceptable inert carrier or diluent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-34952 |
Feb 1990 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/653,954 filed on Feb. 12, 1991, now abandoned.
Foreign Referenced Citations (12)
Number |
Date |
Country |
0126587 |
Nov 1984 |
EPX |
0168707 |
Jan 1986 |
EPX |
0170073 |
Feb 1986 |
EPX |
0182213 |
May 1986 |
EPX |
0235823 |
Sep 1987 |
EPX |
0242134 |
Oct 1987 |
EPX |
0243686 |
Nov 1987 |
EPX |
0289801 |
Nov 1988 |
EPX |
0333175 |
Sep 1989 |
EPX |
0337637 |
Oct 1989 |
EPX |
0343499 |
Nov 1989 |
EPX |
0358085 |
Mar 1990 |
EPX |
Non-Patent Literature Citations (3)
Entry |
Chemical Abstracts 110:75160a. |
Kim et al., J. Med. Chem. 32, 602-604 (1989). |
Deziel, Tetrahedron Letters, vol. 28, No. 38, 4371-4372 (1987). |
Continuations (1)
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Number |
Date |
Country |
Parent |
653954 |
Feb 1991 |
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