Synthesis of glucose-3 and -4-14C of high specific activity and radiochemical purity
β Scribed by E. Sturani
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- French
- Weight
- 388 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0022-2135
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β¦ Synopsis
A method for the enzymatic synthesis of hexoses-3-14C and hexoses-4-14C is presented. The procedure is based on the synthesis of 3-phosphoglyceric acid-1-1% (3PGA) by the action of the ribulose diphosphate carboxylase in the presence of ribulose-l,5 diphosphate and W 0 2 , followed by the reversal of the glycolytic reactions leading from glucose to 3PGA. For the synthesis of hexoses-3-14CC, dihydroxyacetonephosphate-1-14C and cold glyceraldehyde-3-P are condensed by the aldolase reaction, while for the synthesis oJ hexoses-4-14C cold dihydroxyacetonephosphate is condensed with glyceraldehyde-3-P-l-14C. The problems and the results of such syntheses are discussed.
π SIMILAR VOLUMES
Three major DDD isomers, O,P'-DDD, m,p'-DDD and p,p'-DDD, 14C-labelled in the para-chlorophenyl ring, have been synthesized. The DDD products were obtained in isotopic yields ranging fran 42% to 58% and were of high specific activities; 31 mCi/mmol (0,~'-DDD; m,p'-DDD) and 19,8 mCi/mmol (p,p'-DDD).
6-[C3H,]-Dorzolamide' was prepared starting from N,Nt-bis-Boc-6-desmethyldorzolamide. An efficient radiosynthesis was developed involving a regioselective and stereo-controlled 'H-methylation of the a-sulfone carbanion in the presence of the monoprotected sulfonamide anion. The methylation led to a
## Abstract N,Nβ[Methylβ^14^C]βDimethylhydrazine hydrochloride () having a specific activity of 115 mCi/mmol, was synthesized in two steps. Dimethylation of acetophenone hydrazone with ^14^Cβmethyl iodide (specific activity = 58 mCi/mmol) in the presence of potassium in liquid ammonia followed by a