## Abstract (−)‐(__S__)‐ and (+)‐(__R__)‐3‐methylcyclopentene (__1__) has been prepared in a stereochemically unambiguous synthesis. The (__S__)‐configuration for (−)‐__1__ was confirmed by correlation with (−)‐(__S__)‐1‐methylindane.
Synthesis of optically active 3-diazoacetylretinals with triisopropylphenylsulfonylhydrazone
✍ Scribed by Hyun Ok; Charles Caldwell; Daniel R. Schroeder; Anil K. Singh; Koji Nakanishi
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 223 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
An improved synthesis of photoaffinity labeled, optically active retinal derivatives is presented. A stable, easy to handle. glyoxallc acid 2,4,6.-triisopropylphenylsulfonylhydrazone (TIPPS) reacts with 3hydroxyretinal to give the diazoacetylretinal analog in satisfactory yield.
📜 SIMILAR VOLUMES
## Abstract The reduction of dimenthyl ketophosphonates with sodium borohydride involves asymmetric induction at the α‐carbon atom, resulting in a small excess of the (R)‐enantiomer of the α‐hydroxyphosphonate formed. A higher ee purity was achieved if the reduction of chiral dimenthyl ketophosphon
A general synthesis for optically active penems is described. Penems undergo a novel thermal isomerisation reaction. Won-classical B-lactams, exemplified by thienamycin', olivanic acidl and the Woodward's novel synthetic "penem" have all been described as potent antimicrobial agents. Recently, Sever