此处报道的是室温下无金属的碘代芳烃催化的未活化烯烃的氧化。在此过程中,烯烃通过酰胺基团的氧原子和外源HNT 2分子中的氮进行双官能化。这种温和的露天反应提供了对N-双甲苯磺酰基取代的5-亚氨基-2-四氢呋喃基甲胺衍生物的有效合成,这是药物开发和生物学研究的重要主题。基于实验和密度泛函理论计算的机理研究表明,这种转变是通过原位活化底物烯烃而进行的生成的阳离子碘鎓(III)中间体,随后被酰胺的氧原子(而不是氮)攻击形成五元环中间体。最后,该中间体通过作为亲核试剂的NTs 2经历S N 2反应,得到氧和氮双官能化的5-亚氨基-2-四氢呋喃基甲胺产品。使用手性碘代芳烃作为催化剂的本发明烯烃氧化胺的不对称变体对于某些底物也给出了有希望的结果。
Copper(II) Carboxylate-Promoted Intramolecular Carboamination of Alkenes for the Synthesis of Polycyclic Lactams
作者:Peter H. Fuller、Sherry R. Chemler
DOI:10.1021/ol702401w
日期:2007.12.1
intramolecular carboamination reactions of variously substituted gamma-alkenyl amides have been investigated. These oxidative cyclization reactions efficiently provide polycyclic lactams, useful intermediates in nitrogen heterocycle synthesis, in good to excellent yields. The efficiency of the carboamination process is dependent upon the structure of the amide backbone as well as the nitrogen substituent.
已经研究了羧酸铜 (II) 促进的各种取代 γ-烯基酰胺的分子内碳胺化反应。这些氧化环化反应有效地提供了多环内酰胺,它是氮杂环合成中有用的中间体,产率很高。碳胺化过程的效率取决于酰胺主链的结构以及氮取代基。
Nickel-Catalyzed Regio- and Enantioselective Hydroamination of Unactivated Alkenes Using Carbonyl Directing Groups
作者:Changseok Lee、Hyung-Joon Kang、Huiyeong Seo、Sungwoo Hong
DOI:10.1021/jacs.2c02343
日期:2022.5.25
addition of an N–H bond to various alkenes via a direct catalytic method is a powerful way of synthesizing value-added chiral amines. Therefore, the enantio- and regioselective hydroamination of unactivatedalkenes remains an appealing goal. Here, we report the highly enantio- and regioselective Ni-catalyzed hydroamination of readily available unactivatedalkenes bearing weakly coordinating native
The Formation of 3,3,5-Trimethyl-2-pyrrolidone by the Cleavage of 5-Ethoxy-2,2-dimethylvalerophenone with Sodamide<sup>1</sup>
作者:Ronald F. Brown、Norman M. van Gulick
DOI:10.1021/ja01610a004
日期:1955.3
Iodoarene-Catalyzed Oxyamination of Unactivated Alkenes to Synthesize 5-Imino-2-Tetrahydrofuranyl Methanamine Derivatives
作者:Xiao-Jun Deng、Hui-Xia Liu、Lu-Wen Zhang、Guan-Yu Zhang、Zhi-Xiang Yu、Wei He
DOI:10.1021/acs.joc.0c02047
日期:2021.1.1
alkene by an in situ generated cationic iodonium(III) intermediate, which is subsequently attacked by an oxygen atom (instead of nitrogen) of amides to form a five-membered ring intermediate. Finally, this intermediate undergoes an SN2 reaction by NTs2 as the nucleophile to give the oxygen and nitrogen difunctionalized 5-imino-2-tetrahydrofuranyl methanamine product. An asymmetric variant of the present
此处报道的是室温下无金属的碘代芳烃催化的未活化烯烃的氧化。在此过程中,烯烃通过酰胺基团的氧原子和外源HNT 2分子中的氮进行双官能化。这种温和的露天反应提供了对N-双甲苯磺酰基取代的5-亚氨基-2-四氢呋喃基甲胺衍生物的有效合成,这是药物开发和生物学研究的重要主题。基于实验和密度泛函理论计算的机理研究表明,这种转变是通过原位活化底物烯烃而进行的生成的阳离子碘鎓(III)中间体,随后被酰胺的氧原子(而不是氮)攻击形成五元环中间体。最后,该中间体通过作为亲核试剂的NTs 2经历S N 2反应,得到氧和氮双官能化的5-亚氨基-2-四氢呋喃基甲胺产品。使用手性碘代芳烃作为催化剂的本发明烯烃氧化胺的不对称变体对于某些底物也给出了有希望的结果。
Iron-Catalyzed C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Coupling to Construct Quaternary Carbon Centers
centers via C–C coupling protocols remains challenging. The coupling of tertiary C(sp3) with secondary or tertiary C(sp3) counterparts has been hindered by pronounced steric clashes and many side reactions. Herein, we have successfully developed a type of bisphosphine ligand iron complex-catalyzed coupling reactions of tertiaryalkylhalides with secondary alkyl zinc reagents and efficiently realized the