𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The first enantioselective synthesis of optically pure (R)- and (S)-5,5″-dihydroxy-4′,4‴,7,7″-tetramethoxy-8,8″-biflavone and the reconfirmation of their absolute configuration

✍ Scribed by Guo-Qiang Lin; Min Zhong

Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
220 KB
Volume
38
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

The first enantioselective synthesis of the optically pure (R)-and (S) -5,5"-dihydroxy-4',4'",7,7"-tetramethoxy -8,8"-bitlavone is described. The key steps involve the intramolecular oxidative coupling of the cyanocuprat¢ intermediate and FriedeI-Cmfls rearrangement. Their absolute configuration was reconfirmed by CD spectra.

📜 SIMILAR VOLUMES

Synthesis of the optically pure 5,5″-dih
Synthesis of the optically pure 5,5″-dihydroxy-7,7″-dimethoxy-8,8″-biflavone and its derivatives
✍ Fang-Jie Zhang; Guo-Qiang Lin 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 525 KB

## Abstract ( ± )‐5,5″‐Dihydroxy‐7,7″‐dimethoxy‐8,8″‐biflavone (( ± )‐l) was resolved into its optically pare forms __via__ the formation and recrystallization of its (2__R__)‐ and (2__S__)‐1‐(4‐toluenesulfonyl)prolylate, and the methylated derivatives of (+)‐ and (‐)‐1 were also prepared. The abso

Pheromone Synthesis, CXXXV. Synthesis of
Pheromone Synthesis, CXXXV. Synthesis of (4R,5R,6S,7E,9E)-4,6,8-Trimethyl-7,9-undecadien-5-ol and Its Antipode, the Female Specific Compound of the WoodroachCryptocercus punctulatus
✍ Mori, Kenji ;Itou, Masamichi 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 674 KB

## Abstract (4__R__,5__R__,6__S__,7__E__,9__E__)‐4,6,8‐Trimethyl‐7,9‐undecadien‐5‐ol (1) and its antipode 1′, the female specific compound of the woodroach __Cryptocercus punctulatus__, were synthesized by starting from methyl (__R__)‐3‐hydroxy‐2‐methylpropanoate (C).

ChemInform Abstract: Synthesis of Ethyl
ChemInform Abstract: Synthesis of Ethyl Pyrimidine-4-carboxylates from Unsymmetrical Enamino Diketones and Their Application in the First Synthesis of Pyrimido[4,5-d]pyridazin-8(7H)-ones
✍ Fernanda A. Rosa; Pablo Machado; Gabriela F. Fiss; Pamela S. Vargas; Tanize S. F 📂 Article 📅 2009 🏛 John Wiley and Sons ⚖ 24 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

Pheromone synthesis, CXXI. Synthesis of
Pheromone synthesis, CXXI. Synthesis of (4R*,5R*,6S*,7E,9E)-4,6,8-trimethyl-7,9-undecadien-5-ol and its isomers to determine the relative stereochemistry of the female specific compound of the woodroachCryptocercus punctulatus
✍ Mori, Kenji ;Itou, Masamichi ;Brossut, Rémy 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 772 KB

## Abstract By synthesizing some isomers of 4,6,8‐trimethyl‐7,9‐undeca‐dien‐5‐ol, (4__R__\*,5__R__\*,6__S__\*,7__E__,9__E__)‐relative stereochemistry was assigned to the isomer isolated as the female specific compound of the tergal glands secretion of the woodroach __Cryptocercus punctulatus__.