A novel, convenient and efficient method for trifluoromethylation of substrate compounds is disclosed. Particularly, alkoxide and hydroxide induced nucleophilic trifluoromethylation of carbonyl compounds, disulfides and other electrophiles, using phenyl trifluoromethyl sulfone PhSO
2
CF
3
(or sulfoxide PhSOCF
3
) is disclosed. A method of both symmetrical and unsymmetrical anti-2,2-difluoropropan-1,3-diols with high diastereoselectivity (up to 94% de) is disclosed using difluoromethyl phenyl sulfone. This unusual type of high diastereoselectivity was obtained via an intramolecular charge-charge repulsion effect rather than the traditional steric control (based on the Cram's rule). Thus, difluoromethyl phenyl sulfone can be used as a novel difluoromethylene dianion species (“
−
CF2
−
”), which can couple two electrophiles (such as diphenyl disulfide or non-enolizable aldehydes) to give new difluoromethylenated products.
揭示了一种新颖、方便和高效的底物化合物三
氟甲基化方法。特别地,揭示了使用苯基三
氟甲基磺酮PhSO2CF3(或亚砜PhSOCF3)对羰基化合物、二
硫化物和其他亲电体进行烷氧基和羟基诱导的亲核三
氟甲基化。揭示了一种使用二
氟甲基苯基磺酮制备对称和非对称的高对映选择性(最高94% de)的反式
2,2-二氟丙烷-1,3
-二醇的方法。这种不寻常的高对映选择性是通过分子内电荷排斥效应而非传统的立体控制(基于Cram规则)获得的。因此,二
氟甲基苯基磺酮可以用作新型二
氟甲基烯二阴离子物种(“−
CF2−”),可将两个亲电体(如二
苯基二硫化物或不可烯化醛)耦合以产生新的二
氟甲基化产物。