A simple and efficient procedure for the preparation of silica-bonded S-sulfonic acid (SBSSA) by reaction of 3-mercaptopropylsilica (MPS) and chlorosulfonic acid in chloroform is described. This solidacid is employed as a recyclablecatalyst for the synthesis of 1,1-diacetates from aromatic aldehydes and acetic anhydride under mild and solvent-free conditions at room temperature.
Bismuth (III) Chloride<sup>1</sup>; an Efficient and Selective Catalyst for Deprotection of 1,1-Diacetates
作者:I. Mohammadpoor-baltork、H. Aliyan
DOI:10.1080/00397919908086439
日期:1999.8
Abstract A variety of 1,1-diacetates are easily and efficiently deprotected in the presence of catalytic amounts of bismuth(III) chloride affording the corresponding aldehydes in high yields.
Aluminium Chloride: A Mild and Efficient Catalyst for Selective Deprotection of 1,1-Diacetates
作者:Iraj Mohammadpoor-Baltork、Hamid Aliyan
DOI:10.1039/a807187j
日期:——
A mild, efficient and excellent yield method for the selective deprotection of 1,1-diacetates to the corresponding aldehydes in the presence of aluminium chloride (AlCl3) is described.
The molecular structures of metal-salen complexes which exerts pharmacological effects are clarified and the metal-salen complexes having such molecular structures and their derivatives are provided. A metal-salen complex compound is characterized in that a metal atom part in each of multiple molecules of the metal-salen complex or its derivative is multimerized via water.
The present disclosure relates to a ferromagnetic substance containing a crystal of a metal complex molecule in which a heterocycle is bonded to metal, the metal of the metal complex molecule is bonded to the metal of another metal complex via oxygen as a electron donor, and the ferromagnetic substance has a ferromagnetic property balanced with stability of crystals based on a metal—electron donor—metal bond angle that is from 130° to 160°. The present disclosure also relates to a drug containing, as a principal component, the crystal of the metal complex molecule.