𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis, Isolation, and Full Spectroscopic Characterization of Eleven (Z)-Isomers of (3R,3′R)-Zeaxanthin

✍ Scribed by Gerhard Englert; Klaus Noack; Emil A. Broger; Ernst Glinz; Max Vecchi; Reinhard Zell

Publisher
John Wiley and Sons
Year
1991
Tongue
German
Weight
818 KB
Volume
74
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

1. Introduction.

-Starting from the optically pure hydroxyketone 1, an efficient synthesis of (3R,3'R)-zeaxanthin (2) was described recently [l]. The final step involves a double Wittig condensation. Developmental efforts to improve the yield of 2 have Scheme. Synthesis of (2.E)-Zeaxanthenals and ( 2 , E ) -2eaxanthins HO 8 ",,, 4 -3 F no e 5 ! j -HO w-c1-1 3 4 (7Z,9E) 5 (7E,9€) 6 (72.92) 7 (7€,92) 2 (all-E) 18 (92.92) 13 (72) 19 (72,92,7'2) 14 (92) 20 (72,112,7'2) 15 (132) 21 (92,132,92) 17 (72,7'2) 23 (72,92,112,7'2,92) 16 (152) 22 (72,92,7'2,92) 9 (all-€) 10 (72) 11 (92) 12 (72,92) I )

📜 SIMILAR VOLUMES

Synthesis of D3-sulpiride and its (R) an
Synthesis of D3-sulpiride and its (R) and (S) isomers
✍ M. Al-koutayni-rifai; G. Jamet; R. R. Kerr; L. Jung; J. C. Koffel 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 French ⚖ 419 KB

Racemic dg-sulpiride, (R)-(+)-dg-sulpiride and (S)-(-)-dg-sulpiride (with three deuterium atoms in the methoxy function ortho to the benzamide), as well as (R)-(+)-sulpiride and (S)-(-)-sulpiride were synthesized. The structures were characterized by melting points, IR, 1H-NMR, GC-MS and polarimetry