Ultrafast transient lens spectroscopy of various C40 carotenoids: lycopene, β-carotene, (3R,3′R)-zeaxanthin, (3R,3′R,6′R)-lutein, echinenone, canthaxanthin, and astaxanthin

Synthesis of 13C-labelled (all-E,3R,3′R)

Synthesis of 13C-labelled (all-E,3R,3′R)-β,β-carotene-3,3′-diol (zeaxanthin) at C(12), C(13), C(12′), and C(13′) via all-E-2,7-dimethylocta-2,4,6-triene-1,8-dial-13C4

✍ Frederick Khachik; Gary R. Beecher; Betty W. Li; Gerhard Englert 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 French ⚖ 668 KB

## Abstract The title compound (10) has been synthesized from all‐E‐2,7‐ dimethylocta‐2,4,6‐triene‐1,8‐dial (C~10~‐dialdehyde, 8) labelled with four ^13^C from commercially available and relatively inexpensive starting materials. The key starting material in this synthesis, (EtO)~2~P(O)^13^CHMe^13^