Synthesis of fluorinated allylic amines: Reaction of 2-(trimethylsilyl)ethyl sulfones and sulfoxides with fluorinated imines
作者:Santos Fustero、Sonia Flores、Ana C. Cuñat、Diego Jiménez、Carlos del Pozo、Jorge Bueno、Juan F. Sanz-Cervera
DOI:10.1016/j.jfluchem.2007.05.006
日期:2007.10
reaction of 2-(trimethylsilyl)ethyl sulfones and sulfoxides (as vinyl anion equivalents) with imines and imino esters has been described. The process includes a TBAF-mediated fragmentation of 2-(trimethylsilyl)ethyl sulfones to afford the desired allylic amines. When the reaction is performed with the corresponding sulfoxides, the fragmentation takes place under the addition conditions, affording the final
Novel Approach for Asymmetric Synthesis of Fluorinated β-Amino Sulfones and Allylic Amines
作者:Santos Fustero、Juan García Soler、Ana Bartolomé、María Sánchez Roselló
DOI:10.1021/ol034892u
日期:2003.7.1
pure gamma-fluoroalkyl beta-amino sulfones are readily synthesized in three steps starting from fluorinated imidoyl chlorides and arylmethyl sulfones. A complementary two-step sequence starting from chiral fluorinated beta-amino sulfoxides has also been developed. To illustrate the application of this procedure, a new method for the synthesis of alpha-fluoroalkyl allylic amines in optically pure form involving
through original and tailored syntheticprotocols. The addition of vinylmagnesium bromide to CF3-N-aryl and N-alkyl aldimines was efficient and did not require an activating N-substituent. The resultant CF3-allylamines were converted in an efficient and completely stereoselective route to syn CF3-epoxides 3 via formation of bromhydrins 8. The same sequence performed from the aldimine substituted with