A synthesis of dibucaine labeled with l"C in the heterocyclic ring is described. starting with isatin and acetic anh~dride-2-~"C as shown in Scheme I. Two deutero analogs, dibucaine-d2 and dibucaine-dg, were also synthesized by the reactions shown in Scheme 11. Dibucaine-dg was synthesized by conden
Reparation of 3H-, and 14C-labeled ethylmorphine
β Scribed by Yul Yost; Jordan L. Holtzman
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- French
- Weight
- 179 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-2135
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β¦ Synopsis
Abstract
7,8βDidehydroβ4,5βepoxyβ3βethoxyβ17βmethyl(^3^H)β, and β17βmethyl (^14^C)morphinanβ6βol were prepared by substituting the Nβmethyl group with/^a^carbphenoxy group which was then either reduced with LiAl^3^H~4~ or removed to remethylate the Nβatom with ^14^CH~3~I.
π SIMILAR VOLUMES
## Abstract The preparation of [^3^H]Sch 727965 from unlabeled compound and tritiated water was base catalyzed. Diethyl [^13^C~3~]malonate was used to prepare [^13^C~3~]Sch 727965 in five steps in 21.8% overall yield. In a similar manner, [^14^C]Sch 727965 was prepared in five steps from diethyl [2
3H-Sch 47949, racemic 3H-Sch 48461, was prepared at a specific activity of 40 mCi/mmole by Pt catalysed exchange with tritiated water. 3H-Sch 48461 was prepared at a specific activity of 64.6 Ci/mmole by a Pd/C catalysed reduction of an olefinic intermediate. 14C-Sch 48461 was prepared in 8 steps fr
## Abstract ^3^Hβ and ^14^CβLabelled ethynodiol diacetate, chlormadinone acetate, and medroxyprogesterone acetate with one label at the steroid nucleus and the other at the acetoxy group were prepared for use in studies of regioβ and stereospecificity of metabolic hydrolysis of the steroid contrace
Arabi nosy1 -[6-3H] 5-azacytosi ne is prepared by catalytic exchange with tritium gas. The preparation o f arabinosyl-[2,4-14C]5azacytosine from barium [14C]carbonate via [U-14C]guanylurea and [2,4-14C]5-azacytosine is described.