Pent-4-en-1-amines are reactive to fluoroalkyl iodides with respect to sodium dithionite initiated free radical addition reactions. We report here the development of a novel and efficient synthesis of 2-fluoroalkyl pyrrolidine derivatives by sodium dithionite initiated one-pot reaction of pent-4-en-1-amines bearing various protecting groups with fluoroalkyl iodides. Among which, the N-benzyl-pent-4-en-1-amine
One-Pot Addition-Intramolecular N-Cyclization of Carbamates Mediated by Alkali Metallic Reagents as an Approach to 4-(Fluoroalkyl)oxazolidin-2-ones
作者:Xiang Fang、Fan-Hong Wu、Xue-Yan Yang、Zheng-Hua Ju、Yun-Li Hu
DOI:10.1055/s-0030-1260239
日期:2011.11
straightforward strategy for the synthesis of 4-(fluoroalkyl)oxazolidin-2-ones via one-pot addition-intramolecular N-cyclization of allyl carbamates with fluoroalkyliodides is presented. The reaction proceeded in moderate to good yield through regiocontrol and an increase in the reactivity of the ambident nucleophiles by the use of alkali metallic reagents. allyl carbamates - 4-(fluoroalkyl)oxazolidin-2-ones -
Sodium Dithionite Initiated Addition-lactonization of 2-Acyl- amino-4-pentenoic Acids with Fluoroalkyl Iodides to Synthesize 4-Fluoroalkyl-2-acylamino-4-butyrolactones
4‐Fluoroalkyl‐2‐acylamino‐4‐butyrolactones were afforded in moderate yields by the sodiumdithioniteinitiated one‐pot addition‐lactonization reaction of polyfluoroalkyl iodides with 2‐acylamino‐4‐pentenoic acids.
The reactions of difluorodiiodomethane with nucleophiles
作者:Yong Guo、Qing-Yun Chen
DOI:10.1016/s0022-1139(99)00228-6
日期:2000.3
Treatment of difluorodiiodomethane with phenoxides (ArO-) in DMF at room temperature gives ArOCF2I in 7-15%, the carbonates (ArOCO2Ar) being the major products, while with thiophenoxides affords difluoromethylene derivatives (ArSCF2I, ArSCF2SAr, and ArSCF2H) also in low yields. (C) 2000 Elsevier Science S.A. All rights reserved.
Stereoselective cycloaddition–lactonization reaction of 2-allyl-4-pentenoic acids with polyfluoroalkyl iodides. An efficient synthesis of polyfluoroalkyl-containing bicyclolactone derivatives
Polyfluoroalkyl-containing bicyclolactones were synthesized via the sodium dithionite-initiated cyclo-addition lactonization reaction of 2-allyl-4-pentenoic acids and polyfluoroalkyl iodides. The chemo- and stereo-selectivity of the cycloaddition lactonization reaction strongly depended on the space hindrance of 2-substituent in 2-allyl-4-pentenoic acids. The reaction was believed to proceed through a tandem free radical addition-lactonization process. (C) 2010 Elsevier Ltd. All rights reserved.