Synthesis of quinolines and naphthyridines via catalytic retro-aldol reaction of β-hydroxyketones with ortho-aminobenzaldehydes or nicotinaldehydes
作者:Song-Lin Zhang、Zhu-Qin Deng
DOI:10.1039/c6ob01452f
日期:——
Cu(I)-catalyzed retro-aldol reaction of β-hydroxyketones with ortho-aminobenzaldehydes and nicotinaldehydes is reported that produces a range of quinolines and naphthyridines with high efficiency and selectivity. This reaction uses β-hydroxyketones as a regiospecific ketone-protected enolate source viacopper-catalyzed retro-aldol Cα–Cβ bond cleavage. The in situ generated copper enolate undergoes kinetically
General preparative route to benzo[<i>g</i>]quinolines (1-azaanthracenes)
作者:A. Paul Krapcho、Timothy P. Gilmor
DOI:10.1002/jhet.5570360218
日期:1999.3
(8a), but in poor yield. Cyclizations of the aldehydes 8a-d,f,h or the ketone 4g with polyphosphoric acid afforded the benzo[g]quinolines 10a-d,f-h in high yields. Aldehyde 8e was cyclized to 10e using a solution of sulfuric acid in methanol. Several of the benzo[g]quinolines 10c,d could be readly converted into the benzo[q]quinoline-5,10-diones 11c,d on treatment with ammonium ceric nitrate.
已开发出一种方便的合成途径,以生成苯并[ g ]喹啉(1-氮杂蒽)。2-氯烟酸甲酯(3a)与苄基有机锌试剂2a-e的镍催化偶联导致甲基2-苄基取代的烟酸酯4a-e。以类似方式用2a处理2-氯-6-甲基烟酸甲酯(3b),得到2-苄基-6-甲基烟酸甲酯(4f)。2-氯-3-乙酰基吡啶(5)与苄基溴化锌(2a)的偶合产生2-苄基-3-乙酰基吡啶(4g)。2,5-二氯苄基有机锌试剂(2f)的2-choronicotinate甲酯(3a)是非选择性的,但很容易与2-bromonicotinate甲酯(6)偶联生成2-(2,5-二氯苄基)烟酸甲酯(4h)。用氢化铝锂还原后的酯4a-f,h产生相应的醇7a-f,h,随后将其用二氧化锰氧化成各自的2-苄基取代的吡啶-3-羧醛8a-f,h。在一种情况下,将苄基溴化锌(2a)与2-氯吡啶-3-羧甲醛(9)偶联直接导致2-苄基吡啶-3-羧甲醛(8a),但是收率很
HETEROCYCLIC COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ITS APPLICATION
申请人:TOSOH CORPORATION
公开号:US20160056388A1
公开(公告)日:2016-02-25
A novel heterocyclic compound for an organic electroluminescent device excellent in long service life and light-emitting characteristics is provided. A cyclic azine compound has at least one substituent (substituent B) selected from a specific group.