reaction of 4 to 5, as well as novel reactions of the PhSO2 group of 24 with Mg in MeOH, Me3Al, and a combination of allyltrimethylsilane and EtAlCl2. The absolute structure of natural herbindole A was determined to be 1a, and those of natural herbindoles B and C were assumed to be 1b and 1c.
(6R,8S)-(+)-Herbindole A(3a),8(3b)和C(3c)由手性确定的Diels-Alder加合物7使用酸诱导的
吲哚环化反应4至5合成,以及所述PhSO的新颖反应2组24用Mg在MeOH中,Me 3 Al和烯丙基三甲基
硅烷和EtAlCl的组合2。确定天然除草
吲哚A的绝对结构为1a,假定天然除草
吲哚B和C的绝对结构为1b和1c。