Abstract
A new type of transformation of 2-nitro-3-substituted-dihydrofurans to 4-formyl-2-hydroxy-3-substituted-2,3-dihydrofurans was accomplished in 63-84% yields by use of BF 3 ·OEt 2 in CH 2 Cl 2 at -78 to 0°C. © 2003 Elsevier Science Ltd. All rights reserved.