作者:Hannes Neukirch、Antonio Guerriero、Michele D’Ambrosio
DOI:10.1002/ejoc.200300315
日期:2003.10
The structures of products formed by electrophilic transannular cyclization (ETC) in medium-ring compounds are affected by several parameters. The melampolides, (cis,trans)-cyclodeca-1(10),5-diene terpenes, undergo ring closure only under Lewis acid conditions. The transannular distance proves to be a key factor. Molecular mechanics calculations suggest that the cis ring junction of products is formed
中环化合物中亲电环化 (ETC) 形成的产物的结构受几个参数的影响。melampolides,(cis,trans)-cyclodeca-1(10),5-diene terpenes,只有在路易斯酸条件下才会发生闭环。环向距离被证明是一个关键因素。分子力学计算表明产物的顺式环连接是通过较少的构象异构体形成的。ETC 具有化学意义,因为它可能在倍半萜内酯的药理作用中起重要作用。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)