Exo/endo selectivity-control in Lewis-acid catalyzed tandem heterocyclization/formal [4+3] cycloaddition: synthesis of polyheterocycles from 2-(1-alkynyl)-2-alken-1-ones and 1,3-diphenylisobenzofuran
作者:Hongyin Gao、Xingxing Wu、Junliang Zhang
DOI:10.1039/c0cc02778b
日期:——
tandem heterocyclization/formal [4+3] cycloaddition was developed, which provides rapid, efficient and stereoselective access to highly fused polyheterocycles from readily available 2-(1-alkynyl)-2-alken-1-ones and 1,3-diphenylisobenzofuran under mild conditions.
Highly Substituted Furo[3,4-<i>d</i>][1,2]oxazines: Gold-Catalyzed Regiospecific and Diastereoselective 1,3-Dipolar Cycloaddition of 2-(1-Alkynyl)-2-alken-1-ones with Nitrones
作者:Feng Liu、Yihua Yu、Junliang Zhang
DOI:10.1002/anie.200901299
日期:2009.7.13
Rapid access: A gold(I)‐catalyzed1,3‐dipolarcycloaddition of 2‐(1‐alkynyl)‐2‐alken‐1‐ones with nitrones provides a practical, regiospecific, and stereoselective access to highlysubstituted fused bicyclic furo[3,4‐d][1,2]oxazines under mild conditions (see scheme). These fused heterobicyclic compounds can be readily converted into furans or 3,6‐dihydro‐2H‐1,2‐oxazines in a chemoselective fashion
快速获得:金(I)催化的2-(1-炔基)-2-烯丙基-1-酮与1,3-偶极环的加成反应,提供对高取代的稠合双环呋喃的实用,区域特异性和立体选择性的访问[ 3,4- [ d ] [1,2]恶嗪在温和的条件下(请参阅方案)。这些稠合的杂环双环化合物可以以化学选择性方式轻易地转化为呋喃或3,6-二氢-2 H -1,2-恶嗪。
Tetrasubstituted Furans by Pd<sup>II</sup>-Catalyzed Three-Component Domino Reactions of 2-(1-Alkynyl)-2-alken-1-ones with Nucleophiles and Vinyl Ketones or Acrolein
作者:Renrong Liu、Junliang Zhang
DOI:10.1002/chem.200901386
日期:2009.9.21
Multicomponent reaction: A novel PdII‐catalyzed three‐component cascade reaction of 2‐(1‐alkynyl)‐2‐alken‐1‐ones with nucleophiles and vinylketones has been developed (see scheme), which provides efficient, general, and atom‐economic access to tetrasubstituted, multifunctionalized furans.
Gold-catalyzed sequential annulations towards 3,4-fused bi/tri-cyclic furans involving a [3+2+2]-cycloaddition
作者:Suna Liu、Pu Yang、Shiyong Peng、Chenghao Zhu、Shengyu Cao、Jian Li、Jiangtao Sun
DOI:10.1039/c6cc09154g
日期:——
A gold-catalyzed sequential annulation towards 3,4-fused bicyclic furan compounds has been realized by employing 2-(1-alkynyl)-2-alken-1-ones and 1,3,5-triazines as the starting materials under mild reaction conditions. This protocol features the multiple...
Regioselective Addition of Organometallic Reagents to 2-(1-Alkynyl)-2-alken-1-ones for an Efficient Synthesis of Substituted 1,2-Allenyl Ketones
作者:Xiuzhao Yu、Junliang Zhang
DOI:10.1002/adsc.201100009
日期:2011.5
Highly substituted 1,2‐allenyl ketones can be easily and efficiently prepared fromorganometallicreagents and readily available 2‐(1‐alkynyl)‐2‐alken‐1‐ones. The synthetic application of 1,2‐allenyl ketone products was also showcased by palladium‐catalyzed further transformation.