Medium ring compounds (9 to 11 membered rings) having endo (E or Z) and exo double bonds at 1,5-positions were synthesized by intramolecular cyclization of the ω-functionalyzed allylic anion stabilized by a sulfur atom. The yields of cyclization were related not only with the cyclization enthalpy (steric strain of the resultant cyclic compounds) but also with entropy factor.
通过分子内环化,由
硫原子稳定化的ω-官能化的烯丙基阴离子,合成了具有内(E或Z)和外双键的1,5位的中环化合物(9至11个环)。环化的产率不仅与环化焓(所得环状化合物的空间位阻)有关,还与熵因子有关。