An enzymatic method for preparing 6R-[U-14C]-tetrahydrobiopterin from [U-14C]GTP is presented. This method utilizes purified preparations of three biosynthetic enzymes for 6R-tetrahydrobiopterin, i.e., Escherichia coli GTP cyclohydrolase I, rat 6-pyruvoyl-tetrahydropterin synthase, and rat sepiapter
Preparation of some carpoxylic acids-14C(U) from amino acids-14C(U)
β Scribed by T. V. Ramamurthy; K. V. Viswanathan; K. N. Rao
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- French
- Weight
- 156 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0022-2135
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β¦ Synopsis
Abstract
A procedure for the facile preparation of labelled carboxylic acids from labelled Ξ±βamino acids has been described. The reaction is attractive for the small scale synthesis of such compounds.
π SIMILAR VOLUMES
## Abstract [Uβ^14^C]Isosorbide and [Uβ^14^C]dimethyl isosorbide with a specific activity of 462 MBq/mmol was prepared from Dβ[Uβ^14^C]glucose, in an overall yield of 79%, under microwave heating conditions. Copyright Β© 2006 John Wiley & Sons, Ltd.
## Abstract Starting with benzeneβUβ^14^C pentachloronitrobenzeneβUβ^14^C has been prepared by nitration followed by chlorination with antimony pentachloride in the presence of aluminum chloride.
S y n t h e s i s o f a c e t o x y 4 -t r i f l y t r o m e t h y l b e n z o i c a c i d [ r i n g U-i ' C] o r " [ r i n g U -C] T r i f u s a l " ( R i n g U-14C) A n i l i n e 1 was c o n v e r t e i n t o ( r i n g U -1 4 C ) i d o b e n z e n e 2 t h r o u g h t h e ( r i n g U -f 4 C ) p h e
A method for the preparative isolation of [U-14C]solanesol from 14C02-chamber grown tobacco is described. Freeze-dried tobacco leaves were Soxhlet extracted with methylene chloride. Fractionation o f the extract by silica gel chromatography yielded crude solanesol. ## Subsequent purification by no