RING-EXPANSION OF A DIHALOGENOCARBENE ADDUCT OF A CYCLOHEPTENE DERIVATIVE AND THE CORRESPONDING RETRO-REACTION

Article abstract of DOI:10.1016/S0040-4039(00)95433-9

The dihalogenocyclopropane derivative (8c) was obtained in 41percent isolated yield when (9a) was treated with an excess of methanesulphonyl chloride and triethylamine in dichloromethane solution; this transformation may be regarded as the retro-reaction corresponding to the silver(I) perchlorate promoted ring-expansion of (8a) to give (9a).