Inverse electron demand Diels-Alder reactions of indole. VI. A fully removable tether for intramolecular reactions with 1,2,4-triazines
作者:Zhao-Kui Wan、John K Snyder
DOI:10.1016/s0040-4039(98)00379-7
日期:1998.4
The use of the fully removable β-sulfonoacetyl tether to link indole with 1,2,4-triazines allows for the preparation of β-carbolines unsubstituted at C1 and N9 via an intramolecular inverse electron demand Diels-Alder reaction. Mechanistic studies using 2- and 3-deuterated indole derivatives suggest involvement of a [1,5]-hydride shift following the cycloaddition and loss of N2 that precedes desulfination
使用完全可除去的β-磺酰基乙酰基系链将吲哚与1,2,4-三嗪连接,可以通过分子内逆电子需求Diels-Alder反应制备在C1和N9处未取代的β-咔啉。使用2和3氘代吲哚衍生物的机理研究表明,环加成反应会导致[1,5]氢化物移位,并且在脱硫之前会损失N 2。