## Abstract A facile synthesis is described for [3,4,1′‐^13^C~3~]genistein for use as an internal standard in isoflavone analysis by mass spectrometric methods. Ethyl 4‐hydroxy[1‐^13^C]benzoate was first prepared from the reaction of diethyl [2‐^13^C]malonate and 4__H__‐pyran‐4‐one. Two further ^13
Synthesis of cystine-3,3′-13C-3,3,3′,3′-d4 for use in incorporation into proteins
✍ Scribed by Hal S. Beilan; Douglas T. Browne; George L. Kenyon
- Book ID
- 107873782
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 349 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0045-2068
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📜 SIMILAR VOLUMES
Three selectively labeled propynes were prepared either with deuterium or carbon-13 at position 3 and doubly labeled with carbon-13 at positions 1 and 2 by an alkylation reaction from the corresponding labeled or unlabeled monolithio acetylides and dimethylsulfates. Their lithiation with nBuLi gave
## Abstract A flexible synthetic method is presented, which allows all the key isoflavones (daidzein, genistein, glycitein, formononetin and biochanin A) to be prepared in ^13^C‐labelled form __via__ the same route, involving the thallium(III)‐mediated oxidative rearrangement of a key chalcone inte
## Abstract The synthesis of 2‐amino‐2‐hydroxy[__3__‐^__13__^__C__]naphthalene starting from 2‐(1,3‐dioxolan‐2‐yl)‐benzyl chloride and sodium [^__13__^__C__]cyanide in seven preparative steps is reported. Diazotation of the labelled amino compound followed by deprotonation yields [__9a__‐^__13__^__