Journal
ORGANIC LETTERS
Volume 16, Issue 17, Pages 4543-4545Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol502305j
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- University of Johannesburg
- Sasol
- THRIP
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3,4,6-Tri-O-acetyl-D-galactal is selectively converted into 1-O-aryl-2-deoxy derivatives or chiral bridged benzopyrans under Al(OTf)(3) catalysis, depending on reaction conditions. The benzopyrans react with Al(OTf)(3)/acetic anhydride in ring-opening reactions in the absence or presence of acetic acid to selectively produce chiral chromenes or chromans, respectively, in high yields.
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