## Abstract Enantiomerically pure __cis__‐ and __trans__‐5‐alkyl‐1‐benzoyl‐2‐(__tert__‐butyl)‐3‐methylimidazolidin‐4‐ones (**1, 2, 11, 15, 16**) and __trans__‐2‐(__tert__‐butyl)‐3‐methyl‐5‐phenylimidazolidin‐4‐one (**20**), readily available from (__S__)‐alanine, (__S__)‐valine, (__S__)‐methionine,
Preparation of (R)- and (S)-α-methyldopa from a chiral hydantoin containing the α-phenylethyl group
✍ Scribed by José Luis LeóN-Romo; Claudia I. Virues; Judit Aviña; Ignacio Regla; Eusebio Juaristi
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 145 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0899-0042
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract The use of P(III) and P(V) organophosphorus derivatizing agents prepared from __C__~2~ symmetrical (1__R__,2__R__)‐ and (1__S__,2__S__)‐__trans__‐__N__,__N__′‐bis‐[(__S__)‐α‐phenylethyl]‐cyclohexane‐1,2‐diamines **1** and **2**, as well as (1__R__,2__R__)‐ and (1__S__,2__S__)‐__trans__‐
## Abstract Inexpensive acryloyl chloride was converted in 91% overall yield to two derivatives of __β__‐alanine, (__R__,__R__,__R__)‐**6** and (__R__,__R__,__S__)‐**6**, containing two chiral auxiliaries. __C__‐Alkylation of (__R__,__R__,__R__)‐ and (__R__,__R__,__S__)‐**6** __via__ a dianion deri