Cycloserine derivatives

Jan 27, 1970 - skillful technical assistance and to G. Westin for pre- paration of some of the ..... HOAc was added. Themixture was allowed to stand f...
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Journal of Medicinal Chevzistry, 1370, Vol. 13, S o . 5 1018

Yo surDose

nq/animal (ip)

vivors treated group

0.1

0.3 0 , .i 0 . .i 0 , ,i I. 1 , .j 0 ..-I 0 , *-> 0 ..i 0 . .i 0.5

*-,

yo sur-

% I

vivors treated group

stirvibvrs control group

0.1 0 . :3 0 ..i 0 .3

20 50 90 100

20 20 20 20

0 .3 0 . .i 0 .3 0 . .i 0.3 0 .*j 0.5

60 23 :30 100 60 0 90

8 20 13 87 60 33 li

"0

survivors control group

30 0

7 7

io

i 7 20

60 . 0i 60 x0

10 60 40 10 90

7 47 1:i 87 60 33 17

Dose mx/animal (ip)

surDdse mg/animal (ip)

vivors

treated group

Yo survi\ orzl control group

1.0

70

8

1.0

30

20

1. 0 1.0 1.0 1.0 1.0

50 90 60 70

8i 60 :3 3

io

8

1:%

2-aminobenzothiazole i t would appear that the antiviral effect is not improved by increasing the dose level above 0.; mg per animal. Acknowledgment.-The author is indebted to S. Gejer, G. Fuchs, E. Holubars, and 31. Brundin for skillful technical a 4 s t a n c e and to G. Westin for preparation of some of the substances.

H /

Dipurtn~enlof Chenzisiry, Gnivusity of Georgia, Athens, Georgia 30601

Received January 27, 1970

The ki10n-ri3biological activity of D-cycloserine (la), a broad spectrum :mtibiotic, led use to examine derivatives of this compound for antimalarial activity.

ANHK RJ 1 R=R=H b. R =aralkyl; R' = H c. R = H; R = a r a l k y l d. R = R = a r a l k y l a,

We have previously4 reported the synthesis of several derivatives of cycloserine having general structures l b (R = 3-hvdrosy-3-chlorobenzyl) and l e (R' = Ph3C). The pathway by which this was done is shown in Scheme I. In this report, several new Schiff bases (2) are described which can be reduced with KaBH4 to ( 1 ) Suppoi l w l i i i pari 1j.v ( ' c ~ ~ i L r a ,I).i-49-1!43-A1 ~l L)-2993 from tlie U. S. . i r m y Medical Hesearch a n d L)aveloymeut Comlnand. (2) T o \vlioiu inquiries alioiild be addreiiued. ( 3 ) Francie C. Neuhaus, in "Antibiotics," Vol. I, D. Gottlieb a n d P. L . Siiaiv, Ed., Springer-Verlag, Heidelburg, 1967, Chapter 2. (4) (a) C. 11. Stammer a n d J. D. McKinney, J. Org. Chem., 30, 3436 (IVti:); ( b ) K . .I. Payne a n d C. H. Stammer, ibid., 33, 2421 (1968).

lb