Molecular iodine-mediated reaction of 2-(2-phenylethynyl)-Morita–Baylis–Hillman adducts: an easy route to naphthyl ketones and iodo-substituted isochromenes
Synthesis of 5<i>H</i>-1,2,3-triazolo[4,3-<i>a</i>][2]benzazepines from the baylis-hillman adducts of 2-alkynylbenzaldehydes
作者:Seung Ho Ko、Kee-Jung Lee
DOI:10.1002/jhet.5570410422
日期:2004.7
The facile synthesis of 5H-1,2,3-triazolo[4,3-a][2]benzazepines 5a-d by the intramolecular 1,3-dipolar cycloaddition reaction of 2-alkynylphenylallyl azides 4a-d is described. The latter were readily obtained from2-alkynylbenzaldehydes 1a-d through the Baylis-Hillmanadducts 2a-d followed by acetylation to compounds 3a-d and nucleophilic substitution by azide to compounds 4a-d.
描述了通过2-炔基苯基烯丙基叠氮化物4a-d的分子内1,3-偶极环加成反应容易地合成5 H -1,2,3-三唑并[4,3- a ] [2]苯并ze庚因5a-d。后者很容易从2-炔基苯甲醛1a-d通过Baylis-Hillman加合物2a-d获得,然后乙酰化为化合物3a-d,并用叠氮化物亲核取代为化合物4a-d。
Tandem Cyclizations of 1,6-Enynes with Arylsulfonyl Chlorides by Using Visible-Light Photoredox Catalysis
作者:Guo-Bo Deng、Zhi-Qiang Wang、Jia-Dong Xia、Peng-Cheng Qian、Ren-Jie Song、Ming Hu、Lu-Bin Gong、Jin-Heng Li
DOI:10.1002/anie.201208380
日期:2013.1.28
Ray of light: 10a,11‐Dihydro‐10H‐benzo[b]fluorenes were synthesized by a visible‐light‐catalyzed tandemcyclization of 1,6‐enynes with arylsulfonylchlorides. This method extends the scope of enyne cyclizations and represents a new synthetic application of arylsulfonylchlorides.
光线:10 a,11-二氢-10 H-苯并[ b ]芴是通过可见光催化的1,6-烯炔与芳基磺酰氯的串联环化反应合成的。该方法扩展了烯炔环化的范围,代表了芳基磺酰氯的新合成应用。
Iodine-Mediated Intramolecular Electrophilic Aromatic Cyclization in Allylamines: A General Route to Synthesis of Quinolines, Pyrazolo[4,3-<i>b</i>]pyridines, and Thieno[3,2-<i>b</i>]pyridines
An unprecedented synthesis of aromatic ring annulated pyridines from suitably substituted primary allylamines via intramolecular electrophilic aromatic cyclization mediated by molecular iodine under mild conditions is described.
<scp>Metal‐Free</scp>
Arylsulfonyl Radical Triggered Cascade Cyclization of
<scp>Phenyl‐Linked</scp>
1,
<scp>6‐Enynes</scp>
: Synthesis of 2,
<scp>
3‐Dihydro‐1
<i>H</i>
</scp>
‐indenes and 10
<i>a</i>
,
<scp>
11‐Dihydro‐10
<i>H</i>
</scp>
‐benzo[
<i>b</i>
]fluorines
Comprehensive SummaryAryl sulfonyl radical triggered cascade cyclization of phenyl‐linked 1,6‐enynes for the synthesis of biologically important indenes containing alkenyl C—X bonds and 10a,11‐dihydro‐10H‐benzo[b]fluorines is presented. In these radical cascade processes, three new chemical bonds, including C—S, C—C, and C—X bonds, and three C—C bonds are formed in one step. The method is attractive and valuable due to its metal‐free, mild reaction conditions, broad substrate scope and good functional group tolerance.