Claims
- 1. A compound of the formula ##STR22## wherein R.sup.16 is (C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkenyl, phenyl, naphthyl, (C.sub.4 -C.sub.7)cycloalkyl, (C.sub.4 -C.sub.7)cycloalkenyl, (C.sub.7 -C.sub.9)phenylalkyl, (C.sub.11 -C.sub.13)naphthylaklyl, (C.sub.5 -C.sub.10)-(cycloalkyl)alkyl, or one of said groups mono or disubstituted on the aromatic ring with the same or different groups selected from (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)-alkoxy, fluoro or chloro.
- 2. A compound of claim 1 wherein R.sup.16 is cyclohexylmethyl.
CROSS REFERENCE TO RELATED APPLICATION
This is a division, of application Ser. No. 07/336,697 U.S. Pat. No. 4,948,913, filed on Nov. 2, 1987, which is a division of Ser. No. 858,324, filed Apr. 30, 1986, now U.S. Pat. No. 4,729,985, which is a continuation-in-part application of Ser. No. 764,168, filed Aug. 8, 1985, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (3)
Number |
Date |
Country |
45665 |
Feb 1982 |
EPX |
77028 |
Apr 1983 |
EPX |
8403044 |
Aug 1984 |
WOX |
Non-Patent Literature Citations (4)
Entry |
Rich, J. Med. Chem., 28, 263-273 (1985). |
Holladay et al., Tetrahedron Letters, 24, 4401-4404 (1983). |
Evans et al., J. Org. Chem., 50, 4615-4625 (1985). |
Szelke et al., Proc. Am. Pept. Symp. (8th), 1983, 579-582. |
Divisions (2)
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Number |
Date |
Country |
Parent |
336697 |
Nov 1987 |
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Parent |
858324 |
Apr 1986 |
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Continuation in Parts (1)
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Date |
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Parent |
764168 |
Aug 1985 |
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