An asymmetric synthetic route for 1-iodofarnesane, a key intermediate for tocopherol sidechain synthesis, startingfrom (+)-(R)-citronellal was developed. 1-Iodofarnesane was prepared through eight steps in about 50% overall yield, and asymmetric transfer hydrogenation of the enal with a chiral organocatalyst was conducted as a stereoinduction step. To measure the stereoinduction level and optical
Eine neue Methode zur stereochemischen Analyse offenkettiger terpenoider Carbonyl-Verbindungen,
作者:Andreas Knierzinger、Willy Walther、Beat Weber、Robert Karl Müller、Thomas Netscher
DOI:10.1002/hlca.19900730432
日期:1990.6.20
A New Method for the Stereochemical Analysis of Acyclic Terpenoid Carbonyl Compounds
无环萜烯基羰基化合物立体化学分析的新方法
Gold‐Catalyzed Asymmetric Allylic Substitution of Free Alcohols: An Enantioselective Approach to Chiral Chromans with Quaternary Stereocenters for the Synthesis of Vitamin E and Analogues
synthesis of α‐ and γ‐tocopherol (the most biologically active members of vitaminE family) and analogues has been accomplished employing a new enantioselective gold catalyzed intramolecular allylic alkylation reaction followed by an olefin cross‐metathesis as key steps. The methodology proved to be applicable to different olefins highlighting its potential for the synthesis of diverse libraries.
[EN] FLUORINE-CONTAINING ALKYL AMMONIUM BORATE COMPOUND AND METHOD FOR PRODUCING SAME<br/>[FR] COMPOSÉ DU TYPE BORATE D'ALKYLAMMONIUM FLUORÉ ET SON PROCÉDÉ DE PRODUCTION<br/>[JA] 含フッ素アルキルアンモニウムボレート化合物及びその製造方法
This invention aims to provide a compound that is useful as a cocatalyst for the polymerization reaction of olefins, dienes, and acetylenes. According to this invention, it is possible to provide a useful and highly active cocatalyst for the polymerization reaction of olefins, dienes, and acetylenes, represented by the following formula (1): [The definitions of the symbols in the formula are as described in the specification.] containing a fluorine-containing alkylammonium borate compound and compositions containing it, as well as methods for their production.
Photopolymerizable composition
申请人:KURARAY CO., LTD.
公开号:EP0150952A2
公开(公告)日:1985-08-07
A photopolymerizable composition is composed of a polymerizable monomer and an initiator capable of polymerizing said monomer upon exposure to visible light. The initiator consists essentially of (a) at least one photosensitizer selected from an a-diketone, quinone, and their derivatives, (b) at least one accelerator selected from aldehyde containing no amino groups and its derivatives, and possibly (c) an organic peroxide. A filler may be included in the composition, especially if it is for dental use.