## Abstract The natural products avemectin **B**~1a~ **1a** and **B**~1b~ **1b** were each siteโspecifically ^14^C labelled at carbon 23 in a convergent synthesis for metabolism, residue, and environmental studies. The 12โstep radiosynthesis involved a stereoselective aldol condensation and later a
Synthesis of lipoidal drugs: - Glycerides of radiolabelled aspirin
โ Scribed by R. Kumar; J. D. Billimoria
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- French
- Weight
- 338 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
โฆ Synopsis
Triglycerides containing a s p i r i n i n place o f one o r more fatty acid residues have been synthesised. Glycerol, mono and d i palmitic acid glycerides were acylated with the acid chloride o f Lthe corresponding tri-, d i and mono-aspirin glycerides.
๐ SIMILAR VOLUMES
## Abstract Oxidation of clenbuterol 1a with pyridinium chlorochromate yielded 4โaminoโ3,5โdichloroโฮฑโ__tert__โbutylaminoacetophenone 5. Tritiated clenbuterol 1b was produced by reduction of 5 with sodium [^3^H]borohydride. Radioiodination of the clenbuterol precursor [2โ__tert__โbutylaminoโ1โ(4โam
## Abstract Radiolabelled [^14^C]entecavir, (**1**), was prepared in 12 steps from (1S,2R,3S,5R)โ3โ(benzyloxy)โ2โ(benzyloxymethyl)โ6โoxaโbicyclo[3.1.0]hexane **2**. The chemical yield of [^14^C]entecavir was 14% from the epoxide **2**. Introduction of [^14^C] radiolabel was achieved by elaboration
Objective. To test the hypothesis that aspirin and non-steroidal anti-inยฏammatory drugs (NSAIDs) may prevent dementia or cognitive impairment. Design. A two-wave longitudinal study over 3.6 years. Setting. A community survey of elderly persons living in Canberra, Australia. Participants. There we