Bis(iodozincio)methane, prepared from lead-catalyzed reaction of zinc with diiodomethane, afforded 1,3-diketones either by the reaction with acyl cyanides or by palladium catalyzed reaction with acyl chlorides. Reaction with adipoyl dichloride gave cyclic enol ester by intramolecular reaction.
Cyclopalladated Schiff's base liquid crystals: the effect of the acac group on the thermal behaviour
作者:Gareth W.V. Cave、Donocadh P. Lydon、Jonathan P. Rourke
DOI:10.1016/s0022-328x(97)00751-1
日期:1998.3
The cyclopalladation of mesogenic Schiffs bases and subsequent reaction with a beta-diketone yields novel metallomesogens. Ln particular, use of simple alkyl substituted diketones can have a very dramatic effect on both the melting and clearing point. (C) 1998 Elsevier Science S.A. All rights reserved.
US4036605A
申请人:——
公开号:US4036605A
公开(公告)日:1977-07-19
US4176918A
申请人:——
公开号:US4176918A
公开(公告)日:1979-12-04
A Practical Method for Alcohol Oxidation with Aqueous Hydrogen Peroxide under Organic Solvent- and Halide-Free Conditions
A catalytic system consisting of sodium tungstate and methyltrioctylammonium hydrogensulfate effects oxidation of simple secondary alcohols to ketones using 3—30% H2O2 without any organic solvents. The oxidation can be conducted under entirely halide-free, mildly acidic conditions. A combination of tungstic acid and an appropriate quaternary ammoniumsalt also effects the alcohol dehydrogenation. The