Synthesis and reactivity of (RS)-6-chloro-7- or 9-(1,2,3,5-tetrahydro-4,1-benzoxazepin-3-yl)-7H- or 9H-purines bearing a nitrobenzenesulfonyl group on the nitrogen atom
作者:Mónica Díaz-Gavilán、Duane Choquesillo-Lazarte、Josefa M. González-Pérez、Miguel A. Gallo、Antonio Espinosa、Joaquín M. Campos
DOI:10.1016/j.tet.2007.03.155
日期:2007.6
acid-mediated condensation with 6-chloropurine. 6-Chloropurine leads to the N-7″ aminalic bond in the cyclic products and mainly to the N-9″ aminalic bond in the acyclic ones. Substitution of the chlorine atom at the 6″ position of the purine moiety is more feasible when the ring is alkylated at N-7″ than at N-9″. Exchange with a hydroxyl group is performed with water traces in deuterated dimethylsulfoxide
的Ô,Ô -acetalic化合物(RS)-3-甲氧基-1 - [(2) -或(4)-nitrobenzenesulfonyl)] - 1,2,3,5-四氢-4,1-苯并氧氮杂已经研究了在路易斯酸介导的与6-氯嘌呤的缩合反应。6-氯嘌呤在环状产物中导致N -7“氨基键,而在非环状产物中主要导致N -9”氨基键。在6的氯原子的取代“当环被烷基化的嘌呤部分的位置是更可行Ñ比-7” Ñ-9”。在室温下,在溶剂介导的过程中,在氘代二甲基亚砜中与痕量水进行羟基交换。与强亲核试剂(例如,苯硫酚)的交换不需要进一步激活。