A Suzuki-Coupling-Based Generalized Route for the Synthesis of 2-(2/3-Thienyl)cycloalk-1-ene-1-carbaldehydes as Precursors for Condensed Thienophenanthraquinones
作者:Gandhi Kar、Aparna Sarkar、Rumpa Das
DOI:10.1055/s-0036-1591499
日期:2018.2
A one-pot, simple, and general method is described for the synthesis of 2-(2/3-thienyl)cycloalk-1-ene-1-carbaldehydes by means of a Pd(0)-catalyzed Suzuki coupling reactions of 2- or 3-thienylboronic acids with 2-bromocycloalk-1-en-1-carbaldehyde derivatives.
Chemoselective Transformations of Cyclic β-Bromoacrylic Acids with Palladacycles Formed by Aryl Iodides to Access Fused or Spiro Polycycles
作者:Fengru Zhou、Liwei Zhou、Pengyang Jing、Mingjie Sun、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.2c00254
日期:2022.2.18
A palladium-catalyzed chemoselective decarboxylative annulation of different aryliodides with cyclic β-bromoacrylic acids for the construction of interesting fused and spiro polycycles is disclosed. Notably, cyclic β-bromoacrylic acids can chemoselectively act as C1 or C2 insertion units by the use of different aryliodides. 2-Iodo-N-methacryloylbenzamides can undergo a Heck/[4+2] annulation to afford
Platinum(II)-Catalyzed Novel Synthesis of 3,4-Fused Furans
作者:Susanta Kumar Manna、Arabinda Mandal、Suresh Kumar Mondal、Shubhankar Samanta、Jayanta K. Ray、Mahiuddin Baidya
DOI:10.1080/00397911.2014.974615
日期:2015.3.4
furans (both tricyclic and bicyclic) through platinum-catalyzed cyclization of 3-(2-formylcycloalkenyl)-acrylic amides 2 in methanol is described (up to 90% yield). Tricyclic 3,4-fused dihydrofuran derivatives were also obtained via reductive cyclization of 2. The substrates 2 were obtained from β- bromovinyl aldehydes by a Pd-catalyzed Heck reaction. GRAPHICAL ABSTRACT
A metal-free cascade reaction strategy has been developed for the synthesis of novel polycyclic 2-formylthiophenes from β-halo-α,β-unsaturatedaldehydes and 1,4-dithiane-2,5-diol. Recyclable polymer supported organic base was used to perform the reaction process. This synthetic protocol was applied to synthesize several novel polycyclic thiophenes including steroidal D-ring annelated thiophene. Our
Palladium-catalyzed one-pot Suzuki coupling followed by arylpalladium addition to aldehyde: a convenient route to fluoren-9-one derivatives
作者:Sunanda Paul、Shubhankar Samanta、Jayanta K. Ray
DOI:10.1016/j.tetlet.2010.08.062
日期:2010.10
Various fluoren-9-one derivatives were prepared efficiently by a one-pot reaction involving sequential Suzuki coupling of 2-bromophenyl boronic acid with 2-bromocarboxaldehyde followed by intramolecular arylpalladium addition to aldehyde.