Halogen-Exchange Fluorination of β-Chlorovinyl Aldehydes - Unexpected Cascade Transformations in the Fluorination of 4-Chloro-2<i>H</i>
-chromene and 4-Chloro-2<i>H</i>
-thiochromene-3-carbaldehydes
One of the most facile and robust ways of incorporating fluorine atoms in organic substrates is through the Halex fluorination. We have described here the Halex fluorination of β‐chlorovinyl aldehydes using KF/DMSO system under mild conditions. Further the transformation of the fluoro‐substituted intermediates to its dimeric compounds via a cascade sequence of six steps is discussed.
Synthesis of polycyclic oxa-coumarins, potential antitumour agents and a short and convenient synthesis of naphthopyranoquinolines from naphthopyran chloroaldehydes.
作者:Izhar Sami、Gandhi K Kar、Jayanta K Ray
DOI:10.1016/s0040-4020(01)90128-0
日期:1992.1
RAMESH D.; CHATTERJEE B. G.; RAY J. K., INDIAN J. CHEM., 25,(1986) N 9, 964-965
作者:RAMESH D.、 CHATTERJEE B. G.、 RAY J. K.
DOI:——
日期:——
Ramesh, D.; Chatterjee, B. G.; Ray, J. K., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1986, vol. 25, p. 964 - 965
作者:Ramesh, D.、Chatterjee, B. G.、Ray, J. K.
DOI:——
日期:——
Sami, Md. Izhar; Kar, Gandhi K.; Ray, Jayanta K., Organic Preparations and Procedures International, 1991, vol. 23, # 2, p. 186 - 188