One-Pot Synthesis of Pyrrolo[2,1-α]isoquinolines via Tandem Reactions of Vinylselenonium Salt, 2-Bromoethanones, and Isoquinoline
作者:E Tang、Deshou Mao、Qi Sun、Minghong Liao、Yunxia Li、Shanshan Liu
DOI:10.3987/com-19-14162
日期:——
3-unsubstituted pyrrolo[2,1-a]isoquinolines efficiently. Herein, we report a tandem reaction of the methyl(phenyl)vinylselenonium salt with isoquinoline and 2-bromoethanones to access 2,3-unsubstituted pyrrolo[2,1-α]isoquinolines efficiently and conveniently under mild conditions and in moderate to good yields. To the best of our knowledge, this is the first reported one-pot synthesis of the pyrrolo[2,1-a]isoquinolines
Palladium-catalyzed direct and regioselective C–H acyloxylation of indolizines
作者:Jinwei Sun、Fuyao Wang、Yongmiao Shen、Huizhen Zhi、Hui Wu、Yun Liu
DOI:10.1039/c5ob01359c
日期:——
A direct and highly regioselective C1-acyloxylation of indolizines was developed via palladium-catalyzed C–H functionalization. In this reaction, the regioselectivity was achieved in the absence of a directing group.
TEMPO‐catalyzed decarboxylation reactions for the synthesis of 1,2‐unsubstituted indolizines
作者:Yuxuan Zhang、Wenhui Wang、Jinwei Sun、Yun Liu
DOI:10.1002/jhet.3766
日期:2020.1
An efficient synthesis of 1,2‐unsubstituted indolizines was developed via 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO)–catalyzed decarboxylation reaction. A series of target products were successfully prepared with the tolerance of a variety of functional groups. This protocol features advantages such as easily available substrates, broad substituent scope, and eco‐friendly conditions.
regioselectively synthesized by a convenient one pot reaction of the corresponding pyridinium (quinolinium, isoquinolinium) ylide with maleic anhydride (MA) in the presence of the mild oxidant tetrakispyridinecobalt(II) dichromate (TPCD). These reactions proceed via a tandem reaction sequence of 1,3-dipolar cycloaddition of azomethine ylide with MA, anhydride hydrolysis and oxidative bisdecarboxylation
3-Acylindolizines(5a-5f)和它们的苯并类似物1-acylpyrrolo [1,2- a ] quinolines(6a - 6f)和1-acylpyrrolo [2,1- a ] isoquinolines (7a-7i)是通过区域选择性合成的相应的吡啶鎓(喹啉鎓,异喹啉鎓)内酯与马来酸酐 (嘛)在弱氧化剂存在下 四铬吡啶钴(II)重铬酸盐 (TPCD)。这些反应通过偶氮甲meth内酯与1,3,3-偶极环加成的串联反应序列进行嘛, 酐 水解和一级环加合物的氧化双脱羧,然后将二氢吲哚并咪唑脱氢芳构化。 TPCD在反应中同时用作脱羧剂和脱氢剂。这些结果表明TPCD 是用于脂肪族羧酸酯双脱羧的有前途的新试剂。
(<i>E</i>)-2-Methoxyethene-1-sulfonyl fluoride as a precursor of acetylene for synthesis of C<sub>1</sub>/C<sub>2</sub> non-functionalized pyrrolo[2,1-<i>a</i>]isoquinoline derivatives
作者:Jiahong Ma、Weikang Lin、Hua-Li Qin
DOI:10.1039/d3nj03325b
日期:——
A Cu(I)-promoted exclusive synthesis of pyrrolo[2,1-a]isoquinoline derivatives involving (E)-2-methoxyethene-1-sulfonyl fluoride (MESF) and isoquinolinium N-ylides is described. MESF was used as an acetylene substitute for [3+2] cycloaddition and a variety of C1/C2 non-functionalized pyrrolo[2,1-a]isoquinoline derivatives were prepared.
描述了Cu( I ) 促进的吡咯并[2,1- a ]异喹啉衍生物的排他合成,涉及 ( E )-2-甲氧基乙烯-1-磺酰氟 (MESF) 和异喹啉鎓N-叶立德。采用MESF作为乙炔替代物进行[3+2]环加成反应,制备了多种C 1 /C 2非官能化吡咯并[2,1- a ]异喹啉衍生物。