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Chlorinative Cyclization of 1,6-Enynes by Enantioselective Palladium(II)/Palladium(IV) Catalysis

✍ Scribed by Kazuhiro Takenaka; Shintaro Hashimoto; Shinobu Takizawa; Hiroaki Sasai

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
195 KB
Volume
353
Category
Article
ISSN
1615-4150

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✦ Synopsis

Abstract

A novel asymmetric catalysis via a palladium(II)/palladium(IV) cycle has been developed by utilizing a chiral spiro bis(isoxazoline) ligand (SPRIX). Intramolecular chlorinative cyclization of 1,6‐enynes catalyzed by a palladium‐SPRIX complex proceeded enantioselectively to afford α‐methylene‐γ‐lactone derivatives.

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Enantioselective Cycloisomerization of 1
Enantioselective Cycloisomerization of 1,6-Enynes Catalyzed by Chiral Diphosphane–Palladium Complexes
✍ Dr. Andreas Goeke; Ryoichi Kuwano; Prof. Dr. Yoshihiko Ito; Dr. Masaya Sawamura 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 279 KB 👁 1 views

TbtCHSe, 4 was prepared by the reaction of TbtCHN, [9] with (C,H,),TiSe,[li~ in the presence of a catalytic amount of CuCl at room temperature. 4 was obtained as an inseparable mixture of compounds with different numbers of selenium atoms. the average number of which was determined to be 5.1 by elem