Regiochemical control in the synthesis of tetrahydrofurans by acid-catalyzed cyclization of hydroxy selenides and hydroxy sulfides
作者:Michelangelo Gruttadauria、Paolo Lo Meo、Renato Noto
DOI:10.1016/s0040-4020(99)00149-0
日期:1999.4
An efficient regiochemical control in the synthesis of tetrahydrofurans was achieved by acid-catalyzed cyclization of hydroxy-selenides (10a) and (11a) which cyclize in the endolexo mode and by hydroxy-sulfides (10c) and (11c) which cyclize in the exo mode. By cyclization of the relevant hydroxy-selenides, the C15–C20 fragment of (+)-Rolliniastatin 1 was obtained. Semiempirical calculations (PM3) were
通过酸催化以内lexo模式环化的羟基硒化物(10a)和(11a)以及通过exo环化的羟基硫化物(10c)和(11c)对四氢呋喃的合成进行有效的区域化学控制模式。通过相关羟基硒化物的环化,获得了(+)-Rolliniastatin 1的C15–C20片段。半经验计算(PM3)用于合理化实验结果。