A New and Efficient Method for the Trifluoromethylation of Carbonyl Compounds with Trifluoromethyltrimethylsilane in DMSO
作者:Takeshi Oriyama、Katsuyuki Iwanami
DOI:10.1055/s-2005-922767
日期:——
In the presence of MS 4 A in DMSO, trifluoromethylation of various aldehydes and ketones with trifluoromethyltrimethylsilane (TMSCF 3 ) proceeded very smoothly to give the corresponding trifluoromethylated adduct in goodto quantitative yields without a base catalyst.
在 DMSO 中存在 MS 4 A 的情况下,各种醛和酮与三氟甲基三甲基硅烷 (TMSCF 3 ) 的三氟甲基化非常顺利地进行,以良好的定量产率得到相应的三氟甲基化加合物,无需碱催化剂。
TTMPP-catalyzed trifluoromethylation of carbonyl compounds and imines with trifluoromethylsilane
作者:Satoru Matsukawa、Marina Saijo
DOI:10.1016/j.tetlet.2008.05.053
日期:2008.7
A highly basic phosphine, tris(2,4,6-trimethoxyphenyl)phosphine (TTMPP), catalyzes trifluoromethylation using trifluoromethyltrimethylsilane to give the corresponding trifluoromethylated products in good to high yields, with both carbonylcompounds and imines.
Potassium Alkoxide as an Efficient Catalyst for Nucleophilic Perfluoroalkylation: Attempt at Anion-Controlled Enantioselective Insertion of a Trifluoromethyl Group
Potassiumalkoxide was found to be a highly active catalyst for the nucleophilic trifluoromethylation of carbonyl compounds. The catalytic system was successfully applied to the reactions of both aldehydes and ketones, affording the corresponding trifluoromethylated products in high yields at low catalyst loadings (0.1–0.01 mol%) in several solvents, such as THF, toluene, and CH2Cl2. In addition, the
发现醇钾是羰基化合物的亲核三氟甲基化的高活性催化剂。该催化体系成功地应用于醛和酮的反应,在 THF、甲苯和 CH 2 Cl 2等几种溶剂中以低催化剂负载量(0.1-0.01 mol%)以高产率提供相应的三氟甲基化产物。此外,含有 ( S )-2,2'-双[双(3,5-二甲基苯基)膦基]-1,1'-联萘 [( S )-XylBINAP]的 Ru(II) 络合物的钾盐配体和两个l原位制备的-苏糖酸盐配体催化芳族醛的对映选择性三氟甲基化,尽管 ee 值不令人满意(小于 20%)。