## Abstract Continuing our search for natural product based compounds for the control of __Brontispa longissima__ larvae, eight spin‐labeled camptothecin derivatives **7a–h** and the intermediate **2** were first tested for their insecticidal activities against fifth‐instar larvae of __Brontispa lo
Synthesis and Biological Activities of C (5)-N-Spin-Labeled Uridines and Related Derivatives
✍ Scribed by Albert M. Bobst; Alvydas J. Ozinskas; Erik De Clercq
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- German
- Weight
- 422 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Direct introduction of a N‐atom in one step at C (5) of 5‐hydroxyuridine (4a) or 5‐hydroxy‐2′‐deoxyuridine (4b) by certain primary amines led to the synthesis of two novel C(5)‐N‐spin‐labeled nucleoside analogs and to several C(5)‐N‐aryl adducts. Substitution by 4‐amino‐2,2,6,6‐tetramethylpiperidinooxyl (3) at C(5) of 4a or 4b led to the spin‐labeled nucleosides 5‐[(1‐oxyl‐2,2,6,6‐tetramethyl‐4‐piperidinyl)amino]uridine and ‐2′‐deoxyuridine (2a and 2b, respectively). The analogous C(5)‐substituted aniline adducts 5‐anilino uridine (5a) and 5‐anilino‐2′‐deoxyuridine (5b) and the p‐toluidine adducts 5‐(p‐toluidino)uridine (6a) and 5‐(p‐toluidino)‐2‐deoxyuridine (6b) were also prepared. In addition, results of the antiviral and antimetabolic activity of some of these analogs are reported.
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## Abstract Intermediate (Ia) and eight spin‐labeled camptothecin derivatives like (Ib) are synthesized from camptothecin and evaluated for their insecticidal activity against the fifth‐instar larva B.longissima in vivo.
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