✍ Scribed by M. M. Koton; T. M. Kiseieva; F. S. Fiorinsky
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract Two labeled isotopomers of L‐tyrosine, L‐Tyr, have been synthesized using specific properties of the enzymes phenylanine ammonia lyase, PAL, and L‐phenylalanine hydroxylase. In an intermediate step [1‐^14^C]‐, and [2‐^14^C]‐L‐phenylalanine, L‐Phe, have been obtained from [1‐^14^C]‐, and
## Abstract A widely used herbicide, 2,2‐dichloropropionic acid (dalapon), was synthesized with ^14^C‐labeling in the C‐1 or C‐2 positions. The carboxyl labeled material was prepared in 55% yield by carbonation of 1,1‐dichloro‐ethyllithium at approximately −104°. Starting with trichloroacetic acid,
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