我们发现了一种底物,即 5-苯甲酰基-吡咯并[2,1- a ]异喹啉,其中鉴定出三个不同的可官能化 C-H 键,可以明智地选择性地进行位点转化,以生成复杂的多环稠合N-杂环。钯催化的 5-苯甲酰基-吡咯并[2,1- a ]异喹啉的交叉脱氢偶联得到 8 H-茚并-吡咯并[2,1- a ]异喹啉酮,并在氧诱导的钯催化下选择性 C-H 胺化。相同的底物提供并五苯,即9 H-吲哚并吡咯并[2,1- a ]异喹啉。我们还观察到通过位点选择性 C-H 胺化在 5-(4-硝基苯甲酰基)-吡咯并[2,1- a ]异喹啉中形成多环稠合苯并氮杂支架。
我们发现了一种底物,即 5-苯甲酰基-吡咯并[2,1- a ]异喹啉,其中鉴定出三个不同的可官能化 C-H 键,可以明智地选择性地进行位点转化,以生成复杂的多环稠合N-杂环。钯催化的 5-苯甲酰基-吡咯并[2,1- a ]异喹啉的交叉脱氢偶联得到 8 H-茚并-吡咯并[2,1- a ]异喹啉酮,并在氧诱导的钯催化下选择性 C-H 胺化。相同的底物提供并五苯,即9 H-吲哚并吡咯并[2,1- a ]异喹啉。我们还观察到通过位点选择性 C-H 胺化在 5-(4-硝基苯甲酰基)-吡咯并[2,1- a ]异喹啉中形成多环稠合苯并氮杂支架。
Generation of pyrrolo[2,1-a]isoquinoline derivatives from N-ylides: Synthetic control and structural characterization
作者:Florea Dumitrascu、Mino R. Caira、Emilian Georgescu、Florentina Georgescu、Constantin Draghici、Marcel Mirel Popa
DOI:10.1002/hc.20740
日期:2011.11
New pyrrolo[2,1-a]isoquinolines were obtained by two one-pot procedures via 1,3-dipolar cycloaddition between the isoquinolinium N-ylides and symmetrical acetylenic dipolarophiles, avoiding the formation of dihydro intermediates. For structural comparison, the dihydro derivatives obtained by a classical two-stage reaction were characterized by NMR and X-ray crystallography, allowing complete stereochemistry
A formal [3 + 2] annulation reaction of propargyl sulfonium compounds and <i>N</i>-ylides: access to pyrrolo[2,1-<i>a</i>]quinolines, pyrrolo[2,1-<i>a</i>]phthalazines and indolizines
作者:Jing Zheng、Xiaojie He、Hong Xu、Hua Liu、Weiran Yang
DOI:10.1039/d0ob01739f
日期:——
A sequential [3 + 2] annulation of prop-2-ynylsulfonium salt and N-ylides was developed, leading to the formation of a series of pyrrolo[2,1-a]quinolines, pyrrolo[2,1-a]phthalazines and indolizines. The protocol featured the simultaneous one-pot formation of three new C–C bonds in moderate yields under mild conditions. In this reaction, the prop-2-ynylsulfonium salts acted as the C2 synthons and sulfide
开发了丙-2-炔基锍盐和N-叶立德的顺序[3 + 2]环化,导致形成一系列吡咯并[2,1 - a ]喹啉、吡咯并[2,1 - a ]酞嗪和中氮茚。该协议的特点是在温和条件下以中等收益率同时一锅形成三个新的 C-C 键。在该反应中,prop-2-ynyl 锍盐充当 C2 合成子,硫化物充当离去基团。所得产物可作为合成多种化合物的有用前体。
Tewari, R. S.; Dubey, A. K.; Gupta, K. C., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 8, p. 706 - 707
作者:Tewari, R. S.、Dubey, A. K.、Gupta, K. C.
DOI:——
日期:——
Tewari, R. S.; Misra, N. K.; Dubey, A. K., Journal of Heterocyclic Chemistry, 1980, vol. 17, p. 953 - 955
作者:Tewari, R. S.、Misra, N. K.、Dubey, A. K.
DOI:——
日期:——
TEWARI, R. S.;DUBEY, A. K.;GUPTA, K. C., INDIAN J. CHEM., 1981, 20, N 8, 706-707