directly undergo decarboxylation under warming conditions to produce active anion (PhSO2CF2−) without the need of any base or additive, thus allowing for the subsequent nucleophilic (phenylsulfonyl)difluoromethylation of aldehydes or imines to give PhSO2CF2-alcohols or -amines, respectively. Interestingly, the removal of PhSO2 group was achieved simply by elevating the reaction temperature for the conversion
对具有
生物活性的CF 2 H分子的高需求刺激了巨大的努力,以开发用于安装CF 2 H官能团的有效方法。我们发现,苯基磺酰基
二氟乙酸盐(PhSO 2 CF 2 CO 2 - ķ +)可直接经受在温热条件下产生活性阴离子(PhSO脱羧2 CF 2 - ),而不需要任何碱或添加剂的,因此允许随后的亲核醛或
亚胺的(苯磺酰基)二
氟甲基化,生成PhSO 2 CF 2-醇或-胺。有趣的是,仅通过升高用于转化醛以提供CF 2 H-酮的反应温度即可实现PhSO 2基团的去除。