2-Allyloxepanes have been prepared by reaction of 2-(4-nitrobenzyloxy)oxepanes with allyltrimethylsilane in acetonitrile in die presence of BF3-Et2O or from 2-ethoxyoxepane in liquid sulphur dioxide without catalyst. (C) 1998 Elsevier Science Ltd. All rights reserved.
Preparation of 2,7-dioxabicyclo[4.4.0]decane and 2,8-dioxabicyclo[5.4.0]undecane derivatives in five steps from dihydropyran are reported. Transformation of 3-bromo-2-allyloxepane into 2,7-dioxabicyclo-[5.4.0]-undecane is also described.
2-Allyloxepanes have been prepared by reaction of 2-(4-nitrobenzyloxy)oxepanes with allyltrimethylsilane in acetonitrile in die presence of BF3-Et2O or from 2-ethoxyoxepane in liquid sulphur dioxide without catalyst. (C) 1998 Elsevier Science Ltd. All rights reserved.