A simple construction of chiral fused benzoxocine ring ethers from D-glucose by regioselective 8-endo-aryl radical cyclisation
Abstract
A regioselective 8-endo-trig aryl radical cyclisation of the 5,6-deoxy-D-xylo-5-enofuranosides 3a and 3b with tri-n-butyltin hydride provides the chiral furo[3,2-c][2]benzoxocines 4a and 4b in good yields; the crystal structure of 4a is reported.