intermolecular additions of propiolate esters with alcohols. The reaction of propiolate esters and alcohols in the presence of PtCl2 gave (E)-vinyl ethers as the major products at 60 °C, whereas alkyl 3,3-dialkoxypropanoates were predominantly obtained when the reaction temperature was set to 80 °C. On the other hand, a novel regioselective tetramerization of propiolate esters catalyzed by AuCl3 under
[EN] KETAL ESTERS OF ANHYDROPENTITOLS AND USES THEREOF<br/>[FR] CÉTO-ESTERS D'ANHYDROPENTITOLS ET LEURS UTILISATIONS
申请人:XLTERRA INC
公开号:WO2010138842A1
公开(公告)日:2010-12-02
The present disclosure relates to the preparation of ketal compounds from anhydropentitols and oxocarboxylates; derivatives, homopolymers, and copolymers thereof; and various compositions, formulations, and articles derived therefrom.
Atom-economical synthesis of 3,3,3-trifluoropropanal dialkyl acetals through Pd/C catalyzed acetalization of 3,3,3-trifluoropropene
作者:Jian-Ping Kang、Ju-You Lu、Yang Li、Zhi-Xuan Wang、Wei Mao、Jian Lu
DOI:10.1039/c6ra03208g
日期:——
A facile and efficient procedure for one-step synthesis of 3,3,3-trifluoropropanal dialkyl acetals from readily available 3,3,3-trifluoropene (TFP) has been developed. The catalyst can be recycled for 4 times without obviously...
Palladium-catalyzed aerobic oxidation of terminal olefins with electron-withdrawing groups in scCO2
作者:Huan-Feng Jiang、Yan-Xia Shen、Zhao-Yang Wang
DOI:10.1016/j.tet.2007.11.013
日期:2008.1
DMF and an appropriate pressure of O2, cyclotrimerization of terminal olefins became the dominated reaction. When oxygen is absent and triethylamine was added into the reaction system, palladium-catalyzedC–Nbond formation occurs to produce β-aminoacidderivatives as the sole product.
可以通过改变反应条件来实现钯催化带有吸电子基团的末端烯烃的好氧氧化反应的产物控制。当氧化剂,如氯化亚铜2 / O 2,苯醌/ O 2或O的2,什么是存在于SCCO 2,末端烯烃的有氧氧化的顺利进行。在有足够的MeOH和足够的氧气的情况下,缩醛化要比环三聚反应更好,而在scCO 2中有少量的MeOH作为助溶剂,而在DMF中没有MeOH和适当的O 2压力。末端烯烃的环三聚反应成为主要反应。当不存在氧气并将三乙胺添加到反应体系中时,会发生钯催化的C–N键形成,从而生成β-氨基酸衍生物作为唯一产物。
Acetalization of Alkenes Catalyzed by Pd(OAc)<sub>2</sub>/NPMoV Supported on Activated Carbon under a Dioxygen Atmosphere
作者:Arata Kishi、Satoshi Sakaguchi、Yasutaka Ishii
DOI:10.1021/ol990410w
日期:2000.2.1
[reaction: see text] The acetalization of terminal alkenes such as ethyl acrylate and acrylonitrile with alcohols under O2 was efficiently achieved by Pd(OAc)2 supported on activated carbon combined with molybdovanadophosphate (NPMoV). For example, ethyl acrylate was subjected to acetalization with EtOH acidified by CH3SO3H under O2 (1 atm) in the presence of [8 wt%Pd(OAc)2/C] and NPMoV to form ethyl