112723-80-5Relevant academic research and scientific papers
A convenient synthesis of 9H-thioxanthen-9-ones and their aza-analogues
Kobayashi, Kazuhiro,Komatsu, Toshihide,Nakagawa, Kazuhiro,Hara, Erika,Yuba, Shohei
, p. 2577 - 2587 (2014/01/06)
An efficient method for the preparation of 9H-thioxanthen-9-ones and their three aza-analogues has been developed. The reaction of (2-fluorophenyl)(2- halophenyl)methanones, derived from 1-bromo-2-fluorobenzenes and 2- halobenzaldehydes by an easy two-step sequence, with Na2S· 9H2O in DMF at 60 °C gives 9H-thioxanthen-9-ones. This procedure can be applied to the synthesis of 5H-[1]benzothiopyrano[2,3-b](or [2,3-c])pyridin-5-ones or 10H-[1]-benzothiopyrano[3,2-c]pyridin-10-ones starting from 2-, 3- or 4-chloropyridines, respectively.
Synthesis of 4-Amino-3-pyridinyl and 4-Amino-5-pyrimidinyl Aryl Ketones and Related Compounds via an ortho-Lithiation Reaction
Radinov, Rumen,Haimova, Marietta,Simova, Ekaterina
, p. 886 - 891 (2007/10/02)
4-Chloropyridine and 4,6-dichloropyrimidine react regioselectively with lithium diisopropylamide to give 4-chloro-3-lithiopyridine and 4,6-dichloro-5-lithiopyrimidine, respectively.These intermediates react with benzaldehydes to give (4-chloro-3-pyridinyl
