01236nas a2200181   4500008004100000022001400041245013800055210006900193260000900262300001600271490000700287520053900294100002400833700002000857700002100877700002400898856013200922       2024                        eng d  a0022-326300aSynthesis of tetracyclic benzoxazolo-indol-3-ones from isatogens and arynes through a [3+2]-cycloaddition and skeletal reorganization0 aSynthesis of tetracyclic benzoxazoloindol3ones from isatogens an  cOCT   a14919-149280 v893 a<p>
	The construction of an unprecedented tetracyclic benzoxazolo-indol-3-one scaffold has been executed through the [3 + 2]-cycloaddition of isatogens with arynes. The initially formed benzisoxazolo-indol-3-one intermediate undergoes a skeletal reorganization through a 1,3-sigmatropic shift/retro-Mannich reaction with the net formation of one C-N and two C-O bonds. The Lewis acid-catalyzed allylation of some of the resulting benzoxazolo-indol-3-ones resulted in oxazepino-indolones with promising photophysical properties.</p>
1 aHalnor, Swapnil, V.1 aSingh, Maneesha1 aDhote, Pawan, S.1 aRamana, Chepuri, V.  uhttps://library.ncl.res.in/content/synthesis-tetracyclic-benzoxazolo-indol-3-ones-isatogens-and-arynes-through-32-cycloaddition