Phototransformations of some 3-alkoxy-6-chloro-2-{(E)-1′-methyl-2′-phenylvinyl}chromones: A study of type-II and triene bichromophoric system

  • Kamboj R
  • Berar S
  • Berar U
 et al. 
  • 4


    Mendeley users who have this article in their library.
  • 7


    Citations of this article.


Irradiation of a methanolic solution of 3-alkoxy-6-chloro-2-{(E)-1′-methyl-2′-phenylvinyl}-4-oxo-4H-1-benzopyrans yielded 12H-benzo[a]xanthen-12-one, pyranopyrones, oxetanopyrananones and 7-chloro-3-methyl-2-phenyl-1,4-dioxa-cyclopenta-[b]naphthalene-9-one depending upon the structure of 3-alkoxy group (methoxy, benzyloxy, and allyloxy). The methyl group on the styryl moiety has been found to have a profound effect on the product formation due to the variation of energy gap between the π-π* excited state of triene system as compared to the n-π* state of the C{double bond, long}O group. © 2009 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • 1,4-Biradical
  • 12H-Benzo(a)xanthen-12-one
  • Photocyclisation
  • Pyranopyrone

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free