Synthesis of Annulated Arenes and Heteroarenes by Hydriodic Acid and Red Phosphorus Mediated Reductive Cyclization of 2-(Hetero)aroylbenzoic Acids or 3-(Hetero)arylphthalides
作者:Arasambattu Mohanakrishnan、Settu Rafiq
DOI:10.1055/s-0036-1588337
日期:——
Annulated arenes and hetarenes were prepared in good to very good yields by hydriodic acid/red phosphorus mediated reductive cyclization of 3-(hetero)aryl phthalides. The reductive cyclization also proceeded successfully with 2-aroylbenzoic acids and 2-aroylnaphthoic acids.
Synthesis of Annulated Anthracenes, Carbazoles, and Thiophenes Involving Bradsher-Type Cyclodehydration or Cyclization-Reductive-Dehydration Reactions
作者:Settu Muhamad Rafiq、Ramakrishnan Sivasakthikumaran、Jayachandran Karunakaran、Arasambattu K. Mohanakrishnan
DOI:10.1002/ejoc.201500493
日期:2015.8
A conventional BF3·OEt2-mediated Bradsher-type cyclodehydration of 2-arylmethyl benzaldehydes in CH2Cl2 at room temperature gave polycyclic aromatic and heteroaromatic compounds. Alternatively, these compounds could be synthesized in better yields from 2-arylmethylbenzoic acids by triflic-acid-mediated cyclization followed by reductive dehydration.
Steinkopf; Kuehnel, Justus Liebigs Annalen der Chemie, 1940, vol. 545, p. 33,36
作者:Steinkopf、Kuehnel
DOI:——
日期:——
Studies in the Dithienylbenzo[<i>c</i>]thiophene Series
作者:A. K. Mohanakrishnan、M. V. Lakshmikantham、Carol McDougal、Michael P. Cava、Jeffrey W. Baldwin、Robert M. Metzger
DOI:10.1021/jo980246a
日期:1998.5.1
A number of derivatives of 1,3-dithienylbenzo[c]thiophene have been synthesized. The mono-and dicarboxaldehydes have been elaborated to give new vinylenes and cyanovinylenes. beta-Dodecyl- and hexyl-substituted analogues have been prepared. Results from cyclic voltammetric investigation as well as fluorescence studies are reported.
Synthesis and Characterization of Benzannelated Thienyl Oligomers
作者:Pitchamuthu Amaladass、J. Arul Clement、Arasambattu K. Mohanakrishnan