Chemoselective Hydrogenation of Aldehydes under Mild, Base-Free Conditions: Manganese Outperforms Rhenium
作者:Mathias Glatz、Berthold Stöger、Daniel Himmelbauer、Luis F. Veiros、Karl Kirchner
DOI:10.1021/acscatal.8b00153
日期:2018.5.4
catalysts for the homogeneous chemoselective hydrogenation of aldehydes. Among these, [Mn(PNP-iPr)(CO)2(H)] was found to be one of the most efficient base metal catalysts for this process and represents a rare example which permits the selectivehydrogenation of aldehydes in the presence of ketones and other reducible functionalities, such as C=C doublebonds, esters, or nitriles. The reaction proceeds
The present invention pertains to pro-fragrances and relates to a pro-fragrance compound of the formula (I). Furthermore, the invention relates to compositions, a laundry product, a home care product, and an insect repellant, comprising the compound of formula (I). Also encompassed are a method for preparing the compound of formula (I) and uses of a compound of formula (I) for increasing the longlastingness of a fragrance, for increasing the stability and perception of a fragrance, and for improving the adhesion of a fragrance to textiles.
[EN] ACRYLATE-FUNCTIONAL BRANCHED ORGANOSILICON COMPOUND, METHOD OF PREPARING SAME, AND COPOLYMER FORMED THEREWITH<br/>[FR] COMPOSÉ D'ORGANOSILICIUM RAMIFIÉ À FONCTION ACRYLATE, SON PROCÉDÉ DE PRÉPARATION ET COPOLYMÈRE FORMÉ AVEC CELUI-CI
申请人:DOW SILICONES CORP
公开号:WO2020142474A1
公开(公告)日:2020-07-09
A method of preparing an acrylate-functional branched organosilicon compound ("compound") is provided, and comprises reacting (A) a branched organosilicon compound and (B) an acrylate compound in the presence of (C) a catalyst, wherein component (A) has the general formula X-Si(R1)3, where X comprises a halogen-functional moiety and each R1 is selected from R and –OSi(R4)3, with the proviso that at least one R1 is –OSi(R4)3; each R4 is selected from R, –OSi(R5)3, and –[OSiR2]mOSiR3; each R5 is selected from R, –OSi(R6)3, and –[OSiR2]mOSiR3; each R6 is selected from R and –[OSiR2]mOSiR3; each R is an independently selected hydrocarbyl group; and 0≤m≤100; with the proviso that at least one of R4, R5 and R6 is –[OSiR2]mOSiR3. The compound prepared by the method, a copolymer comprising the reaction product of the compound and a second compound, a method of forming the copolymer, and a composition comprising the copolymer are each also provided.
CYCLIC HYDRAZIDES AS FRAGRANCE PRECURSOR COMPOUNDS
申请人:Henkel AG & Co. KGaA
公开号:US20200399233A1
公开(公告)日:2020-12-24
Fragrance precursor compounds of the formula (I) may be derived from hydrazides and fragrance aldehydes and ketones. The fragrance precursor compounds may be used in composition having washing or cleaning agents, cosmetic agents and air care agents. A method for long-lasting fragrancing of surfaces using the fragrance precursor compounds and agents is also disclosed.
well-defined hydride Fe(II) PNPpincercomplex has been prepared, structurally characterized, and used as catalyst in the hydrogenation of aldehydes to alcohols. The new SILP catalyst, with the optimum pore filling, was highly active exhibiting TONs and TOFs of up to 1000 and 4000 h–1, respectively, under mild conditions (25 °C, 10–50 bar H2 pressure) without significant leaching of both the complex and the IL
制备了一种碱耐受性支持的离子液相(SILP)系统,该系统包含定义明确的氢化物Fe(II)PNP钳形配合物,并进行了结构表征,并用作醛加氢制醇的催化剂。新型SILP催化剂具有最佳的孔填充性能,在温和条件(25°C,10–50 bar H 2压力)下,TONs和TOF分别高达1000 h和4000 h –1时表现出很高的活性,并且没有明显的溶出。复合体和IL。