Partial synthesis of tritium-labelled gibberellin-A3
✍ Scribed by M. Lischewski; G. Adam; H.-W. Liebisch; U. Pleiß
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- French
- Weight
- 370 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
The epimeric gibberellin-A 7-aldehydes 1 and 2 were silylated, enolised with KH and 3labelled with -3 H20 to give after desilylation the tritium-labelled epimeric gibberellin-A ?-aldehydes 2 and 2. Subsequent acetylation, oxidation and deacetylation afforded [ 6-3H] gibberellin-A3 (6) and [ 6-3H]6-epi-gibbercllin-A provides a convenient method for the preparation of [ 6-3H] GA3 of high specific radioactivity.
📜 SIMILAR VOLUMES
of Sciences of the GDR, DDR-8051 Dresden, German Democratic Republic s u m y The pbytohomone gibberellin-A was tritium-labell d by a chemical route. The specific aativity o f the [ 6 d -3 H ]gibberellin-,; obtained was 22.5 Ci/nmol.
Commiphora s a p ( 3 1 , s o f t c o r a l s ( 4 1 , termite s o l d i e r s (5-8), t e r m i t e workers (9-101, and a n t s (11). Neither t h e b i o s y n t h e s i s of cembrene-A (presumably from g e r a n y l g e r a n y l pyrophosphate) nor i t s conversion i n t o any simple epoxide, d i o
## Abstract New approaches to the synthesis of 3′‐azido‐3′‐deoxythymidine labelled with tritium in the heterocyclic base have been developed. With this aim, enzymatic transribosylation with [^3^H]thymine using the enzyme preparation from rat liver and a three‐step chemical synthesis with use of the
## Abstract Regiospecific syntheses of tritium labelled precocene I (**5a**) and precocene II (**5b**), the antijuvenile hormones, have been accomplished. The syntheses involved condensations between 2‐hydroxyacetophenones (**1**) with acetone‐T to give cross condensation products **2** which on cy