01326nas a2200157   4500008004100000022001400041245018400055210006900239260007100308300001400379490000700393520058400400100003000984700002401014856013001038       2014                        eng d  a1523-706000aTuning the regioselectivity of gold-catalyzed internal nitroalkyne redox: a cycloisomerization and [3+2]-cycloaddition cascade for the construction of spiro-pseudoindoxyl skeleton0 aTuning the regioselectivity of goldcatalyzed internal nitroalkyn  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a4766-47690 v163 a<p>A simple domino process for the construction of the tricyclic core present in the spiro-pseudoindoxyl natural products has been developed. This involves two intramolecular events: the Au-catalyzed nitroalkyne redox leading to isatogen and its subsequent [3 + 2]-cycloaddition with a suitably positioned olefin. The option to modulate the size of the spiro-annulated ring, which is an important variable in this class of natural products, has been explored. Overall, this process molds a linear precursor into a tricyclic system with complete step, atom, and redox economy.</p>1 aKumar, Chepuri, V. Suneel1 aRamana, Chepuri, V.  uhttps://library.ncl.res.in/content/tuning-regioselectivity-gold-catalyzed-internal-nitroalkyne-redox-cycloisomerization-and-0