## Abstract The synthesis of tracer labelled [11,12‐^3^H]‐β‐carotene is described. The procedure uses Wittig condensation of tracer labelled ^3^H‐retinal (retinal spiked with [11,12‐^3^H]‐retinal) with retinyl triphenylphosphonium bromide. The preparation of tracer labelled[^3^H]‐β‐carotene is suit
Synthesis Of [11β-3H]prostacyclin
✍ Scribed by Ian A. Blair; Christopher N. Hensby; John Macdermot
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- French
- Weight
- 292 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The synthesis of [11β‐^3^H]prostacyclin and [11β‐^3^H]6‐oxo‐prostaglandin F~1α~ has been described. The strategy involved borotritide reduction of prostaglandin D~2~, followed by cyclic iodoether formation. Adenylate cyclase activation in a neuronal somatic cell hybrid and GC‐MS were used for the analysis of the target compounds. The ready acid catalysed ketal formation of [11β‐^3^H]6‐oxo‐prostaglandin F~1α~ is noted.
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## Abstract A simple and highly efficient stereoselective total synthesis of (11__β__)‐11‐methoxycurvularin (**5**), a polyketide natural product, was achieved. The synthesis commenced with a Cu‐mediated regioselective opening of (2__S__)‐2‐methyloxirane (**6**) and comprised a __Keck__ asymmetric
A rapid and easy synthesis of tritium-labelled 8-iodopenicillanate, an efficient inactivator of serine B-lactamase, is described. This method involves only three reaction steps after the introduction of the label in the molecule with an overall yield of 16 % .
## SYNTHESIS OF 13-e-(ll-3H)-RETINOIC ACID The b i o l o g i c a l a c t i v i t y of 1 3 -e -r e t i n o i c a c i d i n p r e v e n t i o n of e p i t h e l i a l cancer i n animals h a s r e c e n t l y been demonstrated [l]. I n c o n n e c t i o n w i t h a m e t a b o l i c s t u d i e s pro
## Abstract __trans__‐Retinal‐11‐^3^H was photolyzed by a fluorescent source to afford a mixture of isomeric retinals, from which 11‐cis‐retinal‐11‐^3^H was isolated by HPLC.