Asymmetric transfer hydrogenation of heterocycle-containing acetophenone derivatives using N-functionalised [(benzene)Ru(II)(TsDPEN)] complexes
作者:Jonathan Barrios-Rivera、Yingjian Xu、Guy J. Clarkson、Martin Wills
DOI:10.1016/j.tet.2021.132562
日期:2022.1
The application of enantiomerically-pure ruthenium(II) catalysts containing N - functionalised TsDPEN ligand to the asymmetric transferhydrogenation of 15 examples of α-heterocyclic acetophenone derivatives is reported. Products of up to 99% ee were formed.
报道了含有 N-官能化 TsDPEN 配体的对映体纯钌 (II) 催化剂在 15 个 α-杂环苯乙酮衍生物实例的不对称转移氢化中的应用。形成高达 99% ee 的产物。
Synthesis of (<i>Z</i>)-<i>N</i>-Alkenylazoles and Pyrroloisoquinolines from α-<i>N</i>-Azoleketones through Pd-Catalyzed Tosylhydrazone Cross-Couplings
作者:Lucía Florentino、Fernando Aznar、Carlos Valdés
DOI:10.1002/chem.201301057
日期:2013.8.5
Azoles reacting in tandem: The ortho‐stereodirecting effect is the key to the stereoselective synthesis of (Z)‐N‐alkenylazoles I through the tosylhydrazide‐mediated Pd‐catalyzed cross‐coupling reaction of α‐N‐azoleacetophenones with ortho‐substituted aryl halides and nonaflates (see scheme). Additionally, the preorganization of the alkene allowed for the development of an auto‐tandem reaction involving
Palladium-Catalyzed Enantioselective Decarboxylative Allylic Alkylation of Acyclic α-<i>N</i>-Pyrrolyl/Indolyl Ketones
作者:Remi Lavernhe、Eric J. Alexy、Haiming Zhang、Brian M. Stoltz
DOI:10.1021/acs.orglett.0c01303
日期:2020.6.5
The synthesis of fully substituted α-N-pyrrolyl and indolyl ketones via enantioselectivepalladium-catalyzedallylic alkylation is described. The acyclic ketones are alkylated in high yields with high enantioselectivities through the use of an electron-deficient phosphinooxazoline ligand, furnishing a highly congested and synthetically challenging stereocenter. The obtained alkylation products contain
CH3CO2H-prompted three components tandem reaction: An efficient and practical approach to trisubstituted pyrrolo[1,2-a]pyrazines
作者:Xianglong Chu、Zeyuan Zhang、Congcong Wang、Xuan Chen、Bin Wang、Chen Ma
DOI:10.1016/j.tet.2017.10.066
日期:2017.12
An efficient protocol for the synthesis of trisubstitued pyrrolo[1,2-a]pyrazines through three components cyclization and one-pot cascade reaction is presented. Various trisubstitued pyrrolo[1,2-a]pyrazines are obtained by this metal-free process in moderate to good yields.
提出了一种通过三组分环化和一锅级联反应合成三取代吡咯并[1,2- a ]吡嗪的有效方案。通过该无金属方法,以中等至良好的产率获得了各种三取代的吡咯并[1,2- a ]吡嗪。