ACETYLENE COMPOUND, SALT THEREOF, CONDENSATE THEREOF, AND COMPOSITION THEREOF
申请人:Fujifilm Corporation
公开号:EP2202220A1
公开(公告)日:2010-06-30
[Problem to be Solved]
To provide an acetylene compound having a structure in which a unit having an amino group and a unit having an ethynyl group are bonded via a linking group, the acetylene compound being introducable to a polymer having thermal resistance.
[Means for Solving the Problem] An acetylene compound represented by the following Formula (1) and a salt thereof:
wherein in Formula (1), X represents a single bond or a divalent linking group; A represents a hydrocarbon group, a heteroaromatic ring or a heteroalicyclic compound; B represents a hydrocarbon group, a heteroaromatic ring, a heteroalicyclic compound or a single bond; R1 represents a hydrogen atom, a hydrocarbon group, a heteroaromatic ring, a heteroalicyclic compound or a silyl group; R4 represents a hydrogen atom or a group that can be a substituent of an amino group; and m, n and a each independently represent an integer of 1 or greater.
Method for preparing acetal-containing compositions
申请人:Xie Chunping
公开号:US20060079720A1
公开(公告)日:2006-04-13
An acetal compound may be formed by the method of reacting a substitiuted or unsubstituted benzaldehyde, a polyhydric alcohol, and an at least one acid catalyst at ambient temperatures, in a homogenous reaction media in the presence of at least one water miscible organic solvent. The molar ratio of the acid catalyst to the benzaldehyde may be less than about 0.6 to 1, respectively, of acid catalyst to benzaldehyde.
Enantioselective Synthesis of Cyanohydrins by a Novel Aluminum Catalyst
作者:Barry M. Trost、Silvia Martínez-Sánchez
DOI:10.1055/s-2005-863716
日期:——
The development of a new chiral aluminum catalyst is reported. This catalyst has been applied efficiently to the asymmetric cyanosilylation of aldehydes.
报道了一种新型手性铝催化剂的开发。该催化剂已有效地应用于醛的不对称氰基硅烷化。
Process For Preparation Of Acetals
申请人:RELIANCE INDUSTRIES LIMITED
公开号:US20130296580A1
公开(公告)日:2013-11-07
A process for the preparation of 1,3:2,4-bis (4-methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-bis (3,4-dimethylbenzylidene) sorbitol (DMDBS) via a dehydrocondensation reaction is disclosed. The reaction is carried out between an aldehyde and an alditol in a mole ratio of 2:1 wherein ionic fluid is used as the acidic catalyst and/or reaction medium. The ionic fluid used in accordance with the present invention is quaternary ammonium salt based ionic liquid.
The present invention is directed to a process for the preparation of 1,3:2,4-bis (4-methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-bis (4-dimethylbenzylidene) sorbitol (DMDBS) by dehydrocondensating an aldehyde and an alditol using a hydrophobic ionic liquid as an acid catalyst. The ionic liquid used in the accordance with the process of the present invention is a phosphonium ion based ionic liquid.