A new synthesis of i' 5N-, 5,4-13C1-aminolevulinic acid (ALA) starting from amorphous 13C is described. NMR-spectroscopic data ( HI 13C, 15N) of the product are presented.
Synthesis of 13C and 15N multilabeled 5-aminolevulinic acid
β Scribed by Katsumi Iida; Masahiro Kajiwara
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- French
- Weight
- 78 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0022-2135
- DOI
- 10.1002/jlcr.541
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β¦ Synopsis
Abstract
5β[4β^13^C,^15^N]β and 5β[5β^13^C,^15^N]Aminolevulinic acid (ALA) were simply synthesized in four steps by the condensation of [1β^13^C,^15^N]β or [2β^13^C,^15^N]glycine, respectively, with phthalic anhydride, followed by conversion to the chloride, coupling reaction with a threeβcarbon unit and hydrolysis. Copyright Β© 2002 John Wiley & Sons, Ltd.
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## Abstract 5β[4,5β^13^C~2~]β and 5β[1,5β^13^C~2~]Aminolevulinic acid (ALA) have been synthesized by the Gabriel condensation of potassium phthalimide with ethyl bromo[1,2β^13^C~2~]acetate (derived from [1,2β^13^C~2~]acetic acid) or ethyl bromo[2β^13^C]βacetate (derived from sodium [2β^13^C]acetate
## Abstract A oneβpot procedure is described for the synthesis of D,Lβ[2β^15^N,5β^13^C]glutamic acid from 2βbromoβ4βbutyrolactone utilizing potassium ^15^Nβphthalimide and potassium ^13^Cβcyanide as label sources. Following a two column purification procedure, the final product is obtained in 38% y
A synthesis of the title compound from /13Clparaformaldehyde and [15N)ammonium chloride V f 8 ethyl 2-(1 ,3-/2-13Cldithianyl) acetate 3a is described. Ethyl/3-13C13-oxopropanoate derived in sl'tu from 3a was converted by a stepwise Strecker procedure to DL-[ 2-13C,15Nlaspartic acid 7a.