Synthesis of N-propargylanabasine derivatives by the mannich reaction
作者:M. V. Mavrov、S. G. Zlotin
DOI:10.1007/s11172-007-0256-0
日期:2007.8
N-Propargylanabasine derivatives bearing various substituents at the carbon atom of the alkyne fragment were obtained by the reaction of anabasine hydrochloride with terminal alkynes and paraformaldehyde. The reaction proceeded with retention of the C(2) chiral center in anabasine fragment. The by-products of the reaction, including 1,3-diacetylene (the products of dimerization of alkynes) and conjugated
The intermolecular cyclotrimerisation of terminal and internal alkynes can be catalysed by simple cobalt complexes such as a CoBr2(diimine) under mild reaction conditions when treated with zinc and zinc iodide with high regioselectivity in excellent yields.
ACETYLENE DERIVATIVE, PROCESS FOR PRODUCING THE SAME, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME AS ACTIVE INGREDIENT, AND LIQUID CRYSTAL ELEMENT MADE THEREFROM
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP0628530A1
公开(公告)日:1994-12-14
An acetylene derivative represented by general formula (I), wherein R¹ represents C₃-C₂₀ saturated or unsaturated alkyl; R² represents optionally halogenated C₁-C₂₀ saturated or unsaturated alkyl or C₂-C₂₀ alkoxyalkyl; A and B represent each phenylene, etc., or alternatively -A-B- represents naphthylene, etc.; m and s represent each 0 or 1; n represents 0 or an integer of 1 through 6; and the symbol * represents an asymmettric carbon atom.
Cobalt‐Catalyzed [4+2+2] Cycloaddition for the Synthesis of 1,3,6‐Cyclooctatrienes
作者:Gerhard Hilt、Judith Janikowski
DOI:10.1002/anie.200800127
日期:2008.6.27
ACETYLENE DERIVATIVES, PROCESS FOR PRODUCING THE SAME, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME AS ACTIVE INGREDIENT, AND LIQUID CRYSTAL ELEMENT MADE THEREFROM