The s y n t h e s i s o f " C -c h l o r o e t h e n e and. 1 4 C -t r i c h l o r o e t h e n e i s d e s c r i b e d , t h e f o r m e r i n 4 s t a t e of h i g h chemicaZ p ur i t y s u i t a b l e f o r p o l y m e r i s a t i o n s t u d i e s . RESUME La s y n t h P s e d e 1 4 C -c h l o r
Synthesis of [4-14C]-pelargonidin chloride and [4-14C]-delphinidin chloride
β Scribed by Michael Kraus; Ellen Biskup; Elke Richling; Peter Schreier
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- French
- Weight
- 157 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
β¦ Synopsis
The synthesis of [4-14 C]-pelargonidin chloride and [4-14 C]-delphinidin chloride via [formyl-14 C]-2-(benzoyloxy)-4,6-dihydroxybenzaldehyde, o,4-diacetoxyacetophenone and o,3,4,5-tetraacetoxyacetophenone is described. The first step comprised labelling of the carbonyl group of 2-(benzoyloxy)-4,6-dihydroxybenzaldehyde, verifying that the coupling with o,4-diacetoxyacetophenone or o,3,4,5-tetraacetoxyacetophenone under hydrogen chloride atmosphere resulted in the formation of [4-14 C] labelled anthocyanidins.
π SIMILAR VOLUMES
A method for the microscale (one m o l e ) synthesis of volatile, 14C-labelled acid chlorides from Ba14C03 using vacuum line techniques is described. By a judicious choice of reagents, desired intermediates and products may be isolated in high yield by simple vacuum transfer techniques without fract
## SYNTtIESIS AHD CHARACTERIZATION OF CARBON-14 LABELLED 4,4'-DIAMINODIPHENYL SULFONE (DAPSONE-l4C; D 3 S -1 4 C > , C.E. B l a c k b u r n and A.J. G l a z k o . D e p a r t m e n t o f P h a r m a c o l o g y . D i v i s i o n of S c i e n t i f i c and M e d i c a l Affairs. P a r k e -D a v i
## Abstract The bismethylenedioxy (BMD) derivative of dexamethasone **2** was silylated with trimethylchlorosilane and imidazole in dimethylformamide to give the 11Ξ²βtrimethylsilyloxy BMD derivative **3**. The Ξ^1^ βdouble bond in **3** was hydrogenated over 5% palladium on carbon to give the Ξ^4^β
## Abstract [4β^14^C]β(25R)βSpirostβ5βenβ3Ξ²βol(diosgenin)__l__, specific activity 3.77 Β± 0.02 mCi/mmole, was synthesized in four stees from (25R)β5βhydroxyspirostβ5βenβ3βoicβ3,5βlactone 4 and [^14^C] methyl magnesium iodide with an overall yield of 18%. The preparation of the starting lactone from