A Pd-catalyzed, boron ester-mediated, reductive cross-coupling of two aryl halides to synthesize tricyclic biaryls
作者:Zhilong Chen、Xiaodong Wang
DOI:10.1039/c7ob01237c
日期:——
Tricyclic biaryls are important scaffold structures in many natural products and lead compounds in drug discovery. The formation of a biaryl unit is often the key step for the synthesis of tricyclic biaryls. Despite significant progress toward the synthesis of biaryl compounds in recent years, the direct cross-coupling of two different aryl halides is still challenging and robust methods are lacking
azaheteroaromatic C–Cl bonds and C(sp2)–H activation have been investigated at high reaction temperatures (180–200 °C). This allowed the fast (10–30 min) synthesis of a variety of azaheteroaromatic ring systems (dibenzo[f,h]phthalazine, dibenzo[f,h]cinnoline, benzofuro[2,3-d]pyridazine, 5H-pyridazino[4,5-b]indole, 7H-indolo[2,3-c]quinoline and 5H-δ-carboline) in moderate to good yields.
在高反应温度(180-200°C)下,已研究了钯催化的环加氢卤化反应,涉及芳族C-Br或活化的氮杂杂芳族C-Cl键的氧化加成和C(sp 2)-H活化。这使得各种azaheteroaromatic环系统(二苯并[的快速(10-30分钟)的合成˚F,ħ ]酞嗪,二苯并[ ˚F,ħ ]噌啉,苯并呋喃并[2,3- d ]哒嗪,5 ħ -pyridazino [ 4,5- b ]吲哚,7 ħ吲哚并[2,3- c ^ ]喹啉和5- ħ -δ咔啉)在中度至良好的产率。
Synthesis of 5,7-dihydro-6h-indolo[2,3-c]quinolin6-ones
作者:G. P. Tokmakov、T. G. Zemlyanova、I. I. Grandberg
DOI:10.1007/bf01169937
日期:1994.4
One-Pot Synthesis of Indolo[2,3-c]quinolin-6-ones by Sequential Photocyclizations of 3-(2-Azidophenyl)-N-phenylacrylamides
作者:Wei Zhang、Zhanshan Li、Weixia Wang、Xiaotian Zhang、Congcong Hu
DOI:10.1055/s-0032-1317703
日期:——
A one-pot synthesis of indolo[2,3-c]quinolin-6(7H)-ones was achieved by sequential photocyclizations of 3-(2-azidophenyl)-N-phenylacrylamides in moderate to high yields. The reactions proceeded via photochemical cyclization of aryl azides to form N-phenylindol-2-carbamides and subsequent 6 pi-electrocyclic reaction and oxidative aromatization to afford the corresponding indolo[2,3-c]quinolin-6(7H)-ones.