作者:Wenbo Liu、Xiaobo Yang、Zhong-Zhen Zhou、Chao-Jun Li
DOI:10.1016/j.chempr.2017.03.009
日期:2017.5
Heteroarene methylation utilizing a cheap and safe methylation source without involving transition metals represents an important yet challenging objective. Here, a simple and clean catalyst-free protocol for the methylation of various heteroarenes (including six- and five-membered types) is described under light irradiation. This protocol employs cheap, readily available, and abundant MeOH as both
利用便宜且安全的甲基化来源而不涉及过渡金属的杂芳烃甲基化代表了重要但具有挑战性的目标。在此,描述了在光照射下用于各种杂芳烃(包括六元和五元类型)甲基化的简单,清洁的无催化剂方案。该方案采用廉价,易于获得的丰富甲醇作为溶剂和甲基化来源。发现添加二氯甲烷(DCM)作为助溶剂可以显着提高甲基化产物的产率。带有各种官能团的杂芳烃可以成功地被甲基化和三氘代甲基化。